Hemutian

File I-751.  Receive a 2 year extension letter.  Pack the 2 year extension letter in your carry on bag for your trip whether your gc has expired or not.  
 
When you return to the USA, present your gc to the airline (which must not be Delta, Spirit, or Turkish) and CBP.  If your gc has expired, present your extension letter to the airline and to CBP as well.  CBP might ask for your extension letter regardless whether you gc has expired.  
 
Our experience:
 
* filed I-751 in October 2021
 
* went on two cruises in November and December 2021. Carried extension letter. Was not asked. December was at Miami cruise port which uses facial recognition and doesn’t check documents.  
 
* Took a cruise on a Friday in January, 2 days before the gc expired. As the gc was due to expire during the cruise, presented the extension letter.  Front line personnel had no clue. Second line personnel had no clue.  After an hour we got to third line personnel who had a clue.  Upon return, CBP didn’t look at the extension letter. 
 
* February 2022, flew to Cancun.  Front line and second line airline employees clueless. Third line had a clue and we were checked in. At the departure gate we go through the same drama.  Upon arrival in Mexico the federal border officer accepted the extension letter and gc.  On the return, first line airline employee had a clue.  Upon arrival, CBP asked for extension letter and verified the case status online before admitting us 
 
* July 2022 flight to Canada. Nightmarish checkin because airline refused to  check us in without using their kiosk.  3rd line airline employee let us check in.  Return from Canada was a breeze and CBP verified case status on extension letter.  
 
God I hate extension letters and for that matter green cards. I had a green card over 30 years. Never a problem flying with a gc, a Canadian passport, and white skin. My wife with her gc, Burmese passport, and golden skin has a much different experience.  Airlines are among the most racist entities I’ve seen.  Hopefully by March 1 her  travel nightmares end with a U.S. passport in hand. 

USCIS Fact Sheets For Naturalization
The multi-language Guide to Naturalization is a downloadable document to help you prepare for naturalization to US Citizenship. Everyone should read this through completely. Remember that form fees and mailing instructions change before the Guide or the forms. ALWAYS check the form download page at uscis.gov for up to date forms, fees and mailing instructions!
A Guide to Naturalization
General Naturalization Requirements
Naturalization
Naturalization: Waivers, Exceptions, and Special Cases
Family Members of U.S. Citizens
Spouses of U.S. Citizens
Waiver for Spouses: 3 years instead of 5
In general, if you have been a Permanent Resident for three years and have been married to and living in a valid marital union with the same U.S. citizen spouse for all three years AND you meet the other criteria (Residence and Physical Presence, Good Moral Character, Language etc), you are eligible for naturalization.
So called "conditional residents" are Permanent Residents nonetheless.
5. When does my time as a Permanent Resident begin?
Your time as a Permanent Resident begins on the date you were granted permanent resident status. This date is on your Permanent Resident Card (formerly known as Alien Registration Card). Click here to view a sample card.
Physical Presence Is Important!
"An applicant is eligible to file if, immediately preceding the filing of the application, he or she:
-has been lawfully admitted for permanent residence (see preceding section);
-has resided continuously as a lawful permanent resident in the U.S. for at least 5 years prior to filing with no single absence from the United States of more than one year;
-has been physically present in the United States for at least 30 months out of the previous five years (absences of more than six months but less than one year shall disrupt the applicant's continuity of residence unless the applicant can establish that he or she did not abandon his or her residence during such period)
-has resided within a state or district for at least three months"
(for spouses of US Citizens filing under the "3 year" exception rule, change all "5 year" notes to 3 years)
Note from me: From the day you become a Permanent Resident, start keeping track of ALL time spent out of the US, including dates and dates of travel. Keep this list in one place, where it is easy for you to get at, and it will make completing N-400 much, much easier! Especially good idea for Canadians who cross the border a lot. Everyone should save whatever travel documentation available should it be required.
Fun!
Study materials in many languages, Flash Cards and test questions:
Civics and Citizenship Study Materials
100 Sample U.S. History Questions with Answers
These include the actual interview questions. Applicants should know all 100 questions, although a random 10 are selected and asked in the interview.
"There are also exceptions for lawful permanent residents married to U.S. citizens stationed or employed abroad. Some lawful permanent residents may not have to comply with the residence or physical presence requirements when the U.S. citizen spouse is employed by one of the following:"
(see this page for more info)
(I'm still looking for the new version of this page, if anyone has it)
There are also special rules for children. Please see this page for Children's Citizenship information:
Citizenship of Children
See the links on the right side of the page.
Info for Military Personnel and their families:
Naturalization Information for Military Personnel
A MUST read:
Dual Citizenship FAQ
Dual Nationality and
United States Law
by Rich Wales
http://www.richw.org/dualcit/
Read here before you swear:
Oath of Allegiance for Naturalized Citizens

As others have said, the service center is assigned when you get your NOA. But if you want to update your profile (the part that shows you're still doing the K-1 visa stuff) you can update to something similar like what mine says and select the Phoenix filing location and that you are now doing ROC.

I've seen a bunch of California people (myself included) get assigned to the National Benefits Center (MSC).
 
But yes, it's assigned and you don't get to pick. There's probably one they send to first and if that is getting a lot of case load, they send on somewhere else.

The service center is assigned by USCIS.  You don't get to pick it.  
 
It seems that most people in California and surrounding states end up getting assigned WAC (California Service center).  So chances are you will get that as well.  You will find out once you get your case number.

Oh, I see. Sorry for the misunderstanding and my tone.

We live with my parents. My mom wrote a letter (well really, I wrote it and she signed it) stating we live with her right now. My husband got his 10 yr green card this summer with no questions or issues.

She generally qualifies for a state ID but if there is fewer than 60 days left on her gc some states won’t issue  a state ID. I think it is worth getting her one. Definitely get one when the extension letter arrives. 
 
 
I would submit it. 
 
yes. That’s we did. We were approved on Friday. For her N-400 we will also show the last three months of utility bills, bank and brokerage statements so that she has proof of the meeting the 3 month residence requirement. 
 
No.  I don’t think you will get an RFE but if you do, you can explain why you are not on the same plan. 
you are welcome. 

Show, highlight, you are paying for her health care from your joint bank account. Your joint bank statement showing shared income and shared expenses being paid over the marriage is strong evidence for a bona fide marriage
 
As for your home address proof...
Provide mail sent to your home address for each of you and both of you over time.
Provide the affidavit from your parents indicating they are your landlord and you both live together as a married couple at their home. They can testify that they were at your wedding and they visit you both at your home and they can attest you both reside together.

Based on your evidence I don’t think you need to explain the lack. Instead emphasize  what you have.  Read on …
But you need renters and life insurance, especially with the baby coming. 
 
Draft a letter for your parents to sign:
 
”To whom it may concern:
 
We are John and Mary Hemutian, residing  at 123 1st St, Fairfield, IL, 60555. 
 
Our son Steve  Hemutian and his wife Sally Hemutian live in one of our properties  at 123 Elm St, Fairfield, IL, 60512. They have been living there since 2020-08-25. We are not charging our son and daughter in law rent and so we do not have a written lease agreement.
 
We have included   a  copy of the property deed showing us as joint owners, and a copy of Steve’s birth certificate showing us as his parents.  
 
If you have any questions please contact Mary at 303 555 1234 or John at 303 555 6789. You can email us  at JohnMaryH@example.com. 
 
We declare under  penalty of perjury under the law of the United States that the foregoing is true and correct. 
 
Signed on 2022-11-01 in Fairfield, IL”

Does not need to be notarized especially since the deed and/or birth certificate likely has one of their signatures. 
 
solid. 
 
Do you both have state drivers licenses / state IDs showing you living at the same address?
 
Do you have usps informed delivery? Show images of envelopes with your names going to the same address where you live. Ideally envelopes with both your names but separate envelope with each name are fine too.  Show 1-2 images per quarter.  

 
Absolutely and congratulations.  When you have a birth certificate, submit that as unsolicited  evidence.  For some  ISOs, a birth certificate of a child from the marriage is all they need.  

@Hemutian In your case you seem to have quite a bit of evidence. I would not give more information than needed. Save explanation for RFE which you are unlikely to receive.

Yes none of these documents are needed for the i751 removal of conditions filing.
I urge you to go to the USCIS site with all the info needed to file an i751 application including the current i751 form, current fee needed, the address to send your spouse's application to, and much more needed information file an i751 successfully. https://www.uscis.gov/i-751 
 
With an i751 filing you need to show you have been in a bonafide marriage with your spouse since you got married.
 
1) You need to show you and your spouse live together throughout your marriage
Provide a lease or leases with each of you being listed on the lease or mortgage
Provide copies of state issued IDs with common home address (driver's license or state issue ID)
Provide some mail showing each receive mail at same address (provide mail address to both of you at common home address)
If needed get an affidavit from landlord that you both live together at your home.
 
2) You need to show that you and your spouse share finances that you support one another financially
File joint tax returns each year (obtain IRS tax transcripts for each year married and submit with i751)
Provide copies of bank statements from joint accounts showing shared income and shared spending throughout marriage
Provide joint bill statements over marriage (Utilities,  phone, internet,)
Joint insurance statements (car, health, life) 
401k or insurance beneficiary
 
3) Show you do thing together as a marriage couple
Have children, provide any birth record of children together 
Photos together at family event or on holiday together
Proof of travel together
Buying large ticket items together like a home or car. 
 
There a long list of good faith proof of your marriage you can provide, @Crazy Cat provided a link to a good web site from visajourney.

Not required for Removal of Conditions.  The previously signed I-864 is still valid.
The VJ guide is very good.  Just follow the steps.
 
Removing Conditions (I-751) on US Permanent Residency Step-by-Step Guide - US Immigration & Visa Guides - VisaJourney

Save yourself time, weight, money and copy paper.  Just send the tax transcripts.  They mean MUCH more than the tax returns, as they PROVE you sent in the forms. 
 
Really.
 
Sukie in NY

Interview report!
 
More than 15 months from filing back in October 2019, we finally had our interview this morning.
 
San Francisco USCIS field office. Parked at the Hilton Hotel two blocks away.
The whole area is deserted due to Covid, and the building is kind of creepy as it's covered in anarchist and "F*** ICE" graffiti. 
Went through security, equal to airport security, they have you take off your belt and shoes. 
 
USCIS waiting room was nearly empty, most seats marked closed due to Covid. 
Waited about 15 minutes, then got called in by a youngish female officer.
My wife and I went in together. The officer had me immediately turn over my big stack of documents/evidence of our marriage.
The officer's attitude was friendly, but she did ask more questions than I was expecting, though nothing too surprising. Interview lasted about 30 minutes. 
 
She asked my wife my birthday, her parents' names, what my job is, how we met, where we live. She asked us both if we had any previous marriages or kids (no). She asked me about our joint bank accounts (yes). She asked my wife how she is supported financially (by me). And then she asked several of the "security" questions from the I-485 form. Up until now, my wife had been listening and responding in English, but the questions in this section were too difficult, so the officer actually got a Chinese language interpreter up on the phone for this part. We didn't have to pay anything for this or arrange this ahead of time. 
 
At the end of the interview, the officer said "well it looks like everything is in order" and thanked us for coming in. She never actually told us "you passed". She haded us a "notice of interview results" that said "USCIS is unable to complete your case at this time. Your case is being continued until a final decision can be made" and "Your case is being held for review." I wasn't worried, because I figured this was just standard routine processing. 
 
Just a few hours after the interview, we logged onto the USCIS website and checked her I-485 case status, and saw the good news. Her case status had been updated today and read "New Card Is Being Produced. On January 28, 2021, we ordered your new card for Receipt Number xxx, and will mail it to the address you gave us." I think it's safe to assume that this point that this means she was approved, and should be receiving her GC shortly!

Family for me (spouse). Good luck.

Yes. My wife had her interview at the San Francisco office in late January, 2021.  That was after being in the ""Case is Ready to Be Scheduled for An Interview" status for over a year.

Interview report!
 
More than 15 months from filing back in October 2019, we finally had our interview this morning.
 
San Francisco USCIS field office. Parked at the Hilton Hotel two blocks away.
The whole area is deserted due to Covid, and the building is kind of creepy as it's covered in anarchist and "F*** ICE" graffiti. 
Went through security, equal to airport security, they have you take off your belt and shoes. 
 
USCIS waiting room was nearly empty, most seats marked closed due to Covid. 
Waited about 15 minutes, then got called in by a youngish female officer.
My wife and I went in together. The officer had me immediately turn over my big stack of documents/evidence of our marriage.
The officer's attitude was friendly, but she did ask more questions than I was expecting, though nothing too surprising. Interview lasted about 30 minutes. 
 
She asked my wife my birthday, her parents' names, what my job is, how we met, where we live. She asked us both if we had any previous marriages or kids (no). She asked me about our joint bank accounts (yes). She asked my wife how she is supported financially (by me). And then she asked several of the "security" questions from the I-485 form. Up until now, my wife had been listening and responding in English, but the questions in this section were too difficult, so the officer actually got a Chinese language interpreter up on the phone for this part. We didn't have to pay anything for this or arrange this ahead of time. 
 
At the end of the interview, the officer said "well it looks like everything is in order" and thanked us for coming in. She never actually told us "you passed". She haded us a "notice of interview results" that said "USCIS is unable to complete your case at this time. Your case is being continued until a final decision can be made" and "Your case is being held for review." I wasn't worried, because I figured this was just standard routine processing. 
 
Just a few hours after the interview, we logged onto the USCIS website and checked her I-485 case status, and saw the good news. Her case status had been updated today and read "New Card Is Being Produced. On January 28, 2021, we ordered your new card for Receipt Number xxx, and will mail it to the address you gave us." I think it's safe to assume that this point that this means she was approved, and should be receiving her GC shortly!

Congratulations! 

Interview report!
 
More than 15 months from filing back in October 2019, we finally had our interview this morning.
 
San Francisco USCIS field office. Parked at the Hilton Hotel two blocks away.
The whole area is deserted due to Covid, and the building is kind of creepy as it's covered in anarchist and "F*** ICE" graffiti. 
Went through security, equal to airport security, they have you take off your belt and shoes. 
 
USCIS waiting room was nearly empty, most seats marked closed due to Covid. 
Waited about 15 minutes, then got called in by a youngish female officer.
My wife and I went in together. The officer had me immediately turn over my big stack of documents/evidence of our marriage.
The officer's attitude was friendly, but she did ask more questions than I was expecting, though nothing too surprising. Interview lasted about 30 minutes. 
 
She asked my wife my birthday, her parents' names, what my job is, how we met, where we live. She asked us both if we had any previous marriages or kids (no). She asked me about our joint bank accounts (yes). She asked my wife how she is supported financially (by me). And then she asked several of the "security" questions from the I-485 form. Up until now, my wife had been listening and responding in English, but the questions in this section were too difficult, so the officer actually got a Chinese language interpreter up on the phone for this part. We didn't have to pay anything for this or arrange this ahead of time. 
 
At the end of the interview, the officer said "well it looks like everything is in order" and thanked us for coming in. She never actually told us "you passed". She haded us a "notice of interview results" that said "USCIS is unable to complete your case at this time. Your case is being continued until a final decision can be made" and "Your case is being held for review." I wasn't worried, because I figured this was just standard routine processing. 
 
Just a few hours after the interview, we logged onto the USCIS website and checked her I-485 case status, and saw the good news. Her case status had been updated today and read "New Card Is Being Produced. On January 28, 2021, we ordered your new card for Receipt Number xxx, and will mail it to the address you gave us." I think it's safe to assume that this point that this means she was approved, and should be receiving her GC shortly!

Interview report!
 
More than 15 months from filing back in October 2019, we finally had our interview this morning.
 
San Francisco USCIS field office. Parked at the Hilton Hotel two blocks away.
The whole area is deserted due to Covid, and the building is kind of creepy as it's covered in anarchist and "F*** ICE" graffiti. 
Went through security, equal to airport security, they have you take off your belt and shoes. 
 
USCIS waiting room was nearly empty, most seats marked closed due to Covid. 
Waited about 15 minutes, then got called in by a youngish female officer.
My wife and I went in together. The officer had me immediately turn over my big stack of documents/evidence of our marriage.
The officer's attitude was friendly, but she did ask more questions than I was expecting, though nothing too surprising. Interview lasted about 30 minutes. 
 
She asked my wife my birthday, her parents' names, what my job is, how we met, where we live. She asked us both if we had any previous marriages or kids (no). She asked me about our joint bank accounts (yes). She asked my wife how she is supported financially (by me). And then she asked several of the "security" questions from the I-485 form. Up until now, my wife had been listening and responding in English, but the questions in this section were too difficult, so the officer actually got a Chinese language interpreter up on the phone for this part. We didn't have to pay anything for this or arrange this ahead of time. 
 
At the end of the interview, the officer said "well it looks like everything is in order" and thanked us for coming in. She never actually told us "you passed". She haded us a "notice of interview results" that said "USCIS is unable to complete your case at this time. Your case is being continued until a final decision can be made" and "Your case is being held for review." I wasn't worried, because I figured this was just standard routine processing. 
 
Just a few hours after the interview, we logged onto the USCIS website and checked her I-485 case status, and saw the good news. Her case status had been updated today and read "New Card Is Being Produced. On January 28, 2021, we ordered your new card for Receipt Number xxx, and will mail it to the address you gave us." I think it's safe to assume that this point that this means she was approved, and should be receiving her GC shortly!

Take that as their "final answer."  

If I were you, l would re-create the filled out I-485 (as well as any other forms submitted with it) so that you have physical copies, and bring these to the interview. The interviewer should a copy, but just in case he or she doesn't, you have the backup. Also, you're going to want copies of all these forms for when you apply for removal of conditions and naturalization. 
 
You don't need to fill out a new Affidavit of Support. Just bring the updated supporting documents.
 
Not having an "album" is fine, but I'd recommend you go for higher quality, color photos over computer-printed black and white. FedEx Print Centers charge just 39 cents each for 4x6" high quality photo prints. 

The main thing the IO will do is review all the information on the I485 for accuracy.  This includes all the yes/no questions.  When my wife and I were at her interview (some time ago), the IO also allowed us to add any additional evidence to the submission, and asked us some relationship questions like how we met, when we decided to get married, do we know each other's families, etc.  It was not a Stokes interview where they separate the spouses, but I imagine the IO wanted to get a feeling of us as a married couple.  We also showed the IO our wedding album, and showed her other photos from a recent (at the time) trip to Florida.  You might be able to find sample interviews on YouTube that may be more recent, and you can also check out the reviews for your local office here on VJ.
 
Good Luck!
 
https://www.visajourney.com/reviews/index.php?cnty=&cty=Cincinnati+OH&dfilter=5

We luckily took those rather cryptic instructions very literally. We brought with us the the interview every shred of paper that we had received from USCIS/NVC/DOS, and all original certificates/documents/paperwork that we had amassed thus far in your immigration journey. 
 
It was a good thing that we did. During the AOS interview, the IO wanted to see the my original divorce decree, claiming that he didn't have a copy of it in his files. I know that I had previously sent a copy of the divorce decree with my initial I-129F visa petition, the prior year. With all of our original, hard to replace documents I had individually placed them in plastic page presentation sleeves, and had made good color laser copies of this documents. So, I was able to show the IO the original and the copy for comparison. I asked him to compare the two, he could keep the copy for their records, and we kept the original. I am pretty certain that helped avert us from getting an RFE for a document, and an associated delay in processing. He could have asked for many of documents or papers. 
 
HTH, YMMV
Good luck on your immigration journey.