This is asked about time and time again. The instructions state to mail the I-129F petition to the Dallas Lockbox facility, but people are still often confused about where to mail it, where it goes, and where it gets processed.
The Dallas Lockbox is an intake facility. It is not a USCIS service center. They do not process and adjudicate the petitions there.
The address for regular mail is a Dallas address and the address for courier mail is a Lewisville address. They are still both being sent to the Dallas Lockbox. The difference in addresses is just because the Dallas PO Box address cannot accept courier mail.
This is exactly what happens when your petition is received at the Dallas Lockbox > http://www.uscis.gov/about-us/directorates-and-program-offices/lockbox-intake/lockbox-intake-processing-questions-and-answers
The Lockbox Service provider performs the following activities when processing incoming applications:
Receive, open, sort and stage mail.
Prepare and scan documents.
Enter document data in system from scanned images.
Accept or reject applications and related fees based on business rules.
Balance applications and fees.
Deposit payments to the U.S. Treasury
Send receipt notices for accepted applications to the applicant and designated representative.
Return rejected applications to the applicant or designated representative.
Transmit application data to USCIS and payment data to U.S. Department of Treasury.
Send application files to the appropriate USCIS service center or field office for further processing.
Once your petition is received and dealt with by the Lockbox facility, it will be sent to one of the USCIS service centers to be adjudicated. This is not a transfer of your case. Transfers only happen between one service center and another. If your petition was to be transferred, then you would receive a transfer notice stating such. Don't enter a transfer into your VJ timeline unless you actually receive a transfer notice, which is something entirely separate/different from your NOA1 receipt notice of filing.
Your receipt notice (NOA1) will contain your receipt number and the service center location that your petition was sent to. Currently there are only two service centers processing the I-129F petitions. They are California (CSC) and Texas (TSC). If your receipt number begins with WAC, then your petition is at the CSC. If your receipt number begins with SRC then your petition is at the TSC.
Typically the petitions are sent to one of the two service centers based on where the USC petitioner resides. I have seen some report that is not always 100% the case, but for the most part this is correct.
California Service Center: Alaska, Arizona, California, Colorado, Guam, Hawaii, Idaho, Nevada, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Montana, Nebraska, North Dakota, Ohio, Oregon, South Dakota, Utah, Washington, Wisconsin and Wyoming.
Texas Service Center: Alabama, Arkansas, Connecticut, Delaware, Florida, Georgia, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Mississippi, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, Oklahoma, Tennessee, Texas, Vermont, Virginia, U.S. Virgin Islands, West Virginia and the District of Columbia.
Do you mean to say your visa will expire in 10 days, but you plan to get married in 5 days?
You can stay and do adjustment of status from your B2 to permanent resident, but are you ready for that? Cost is one thing to consider, but what about your life back in your home country? This process could take 6 months to a year generally speaking. Do you not have any business to wrap up? A job to quit? Documents to secure/grab? You cannot return to your home country without at least obtaining an Advanced Parole document, which may take at least 3 months, if not more depending on your case. You cannot work here without an EAD, which will take generally 3 months. Can your future spouse support you until then and then some? What evidence of bona fide marriage would you have if you kept coming and visiting on a visitor's visa? Are you confident that between now and the interview date you'd be able to arrange all of this?
It's not impossible, but it's not a light decision to make. Why not take a look at the I-130/I-485/I-131/I-766/I-864 documents you have to submit on the USCIS.gov website first? Read through the required evidence and supporting documents that need to be submitted with your application so you know what you are planning to get yourself into.
