I751 biometric ?

You can try to get it done earlier by taking your biometrics notice and visiting the ASC office to see if they will assist you that day. I’ve had...

Can I apply for SSN if I don't have a green card

If you have an employment authorization document from USCIS, you should be able to apply for an SSN.

It will likely come up during the adjustment interview but it should not bar you from adjusting your status.

How does co-sponsoring work for filing taxes? Also is there a grace period from co-sponsoring someone to sponsor family member?

Sponsoring someone for a green card is not relevant to the filing of your taxes. However, you will have to disclose your tax returns to USCIS....

Asylum

Yes you have the possibility of being arrested by ICE if you are in removal proceedings.

It's generally not a good idea to travel if you have any kind of charge or conviction on your record. You can be put through secondary inspection...

R1 VISA

If you don't receive the notice in the mail by that date, then you can contact them. Like my colleagues mentioned, if you haven't moved recently,...

When to file n400, married by a US citizen

If it has been three years, then you should now be able to apply for naturalization. Best of luck!

What documents are needed to suBmit for RFE

Based on your statements, it appears that you will need the assistance of an attorney who can help you respond properly to the RFE. Best of luck!

What is the recommendations if I wanna stay outside the states as LPR for a long duration for a year ?

You may need to apply for a reentry permit at some point. The best thing to do would be to consult with an immigration attorney.