I feel the need to add to this, if you all don't mind.
It is highly recommended that anyone who is coming in on a K1 visa to apply for a Social Security Number (SSN) before their marriage.
The Social Security Administration (SSA) Agents are easily confused by the K1 Visa, and may (wrongfully) assume that now that you're married, you're no longer a K1 visa holder, and no longer qualify for a SSN. It is best to apply for a SSN in the name which is on the immigrant's I-94 and passport to avoid this potential headache and several trips back & forth.
With the I-94 going electronic, there is also no need to wait anymore. Their systems are updated instantly the moment of Point of Entry (PoE).
When we applied for my husband's SSN we waited 4 weeks to hear from them about the issuance, and got a letter in the mail informing us it is being mailed and will arrive within 2 weeks, so I would also advise people to anticipate a 4-6 week wait, until it's in your hands.
my husband has only been working one month when we sent ours, we included recent pay stub and a letter from employer, we included tax transcripts but he was a student at the time so don't help much. we had a joint sponsor but the lawyer told us it wasn't necessary, hoping it will be enough.
