What do I put in Part 10 Q 8 of N400?

I would put the name she had when they were married.

If I have misplaced my birth certificate, can i submit the family registration certificate, instead? (Principal applicant f4)

It would be best to obtain a new birth certificate from your home country. It is possible to submit other evidence. It would be good for both ...

Can i apply for OPT while my I485 is pending ?

Yes you can apply for OPT. It's important to maintain status while waiting for 485 to be processed.

What is the meaning of Visa status “Refused” ?

I agree with my colleagues. Your best option is to comply with the letter from the consulate and see the result.

Regarding i 130 file new case or wait for response ?

There is no definite time period for responding to a RFE. You do not need to file a new I130.

Joint sponsor's wife's last name is different now.. for I-864?

You may want to put the name on the joint tax return. You can also add a letter of explanation stating that she changed her name on the date her...

GC holder, trying to invite mother to US

You can contact a US Senator or your US Representative to assist you. However you need to show that your mother has many ties to your home country,...

I put unemployed on my wife employment status because she wasnt working that time. Do we need to update it?

You can update the status at her interview.

Is it possible to have co-sponsor in I129(k1) visa?

Yes you can have a co-sponsor for your fiance. The co sponsor needs to be either a US green card holder or a US citizen.

You should submit your request for a new appointment along with a letter of explanation about why you will not be able to attend. it is best to...