You may be able to ask the specific embassy directly so that you have their official answer. The specific embassy may accept the work number...

Can i change my address, my I-130 is approved?

Yes, you are actually required to notify USCIS of your address change using Form AR-11.

Student visa refused twice in last two months can I still visit on B1?

You also need to be mindful of the reasons for denial of your F1. You may need to address that situation first. Generally speaking you are OK to...

I am on H1B visa, i want to open an LLC under my name. i will still be working for my visa sponsoring employer

This may become a very complicated situation- I strongly recommend consulting an attorney familiar with immigration law as well as corporate laws...

I study in USA F1 Visa Can I Apply for a green card?

Generally speaking, you need a sponsor- either family or employer- in order to apply for permanent residency. There are many options- you need to...

Can I apply for change of status from H1b to F1?

I would recommend responding to the RFE - this is somewhat usual. You cannot file a change of status application since you are not in any status...

Would I have to marry my Romanian fiancé in Romania or can it be done in the US? Also, what needs to be filed in both loacations

You can get married and then file a green card application through the consulate or he may enter as a fiance and you can get married in the US and...

If my spouse is currently in the U.S., what forms do I need to file in order to petition her?

If you are a US citizen then he may be eligible to adjust to permanent resident status- in this case you may file I-485 and I-765 as well. If he is...

You may file for L1 visa extension through USCIS and stay in the US. Note that per new policy you may face added scrutiny of the extension...

Co-founding a startup on H1B Visa?

This is a very complex situation- I strongly recommend consulting an attorney familiar with immigration law and startup/ corporate laws.