If the EAD is based upon a pending I-485, the category is (c)(9).

Can I file N-400 if my I-751 is pending for adjudication after divorce? I got my conditional GC on Nov 2015.

If you became a LPR in November 2015, it appears that you have accrued the 5 years of LPR status. Filing the N-400 will not hinder the processing...

A copy of the K-1 visa and entry stamp in the passport should be sufficient.

Can I re-file new corrected I 765 form to USCIS before I get notice?

I would wait for the rejected package to be returned, just to make sure that they don’t cash the check in the first package. I recognize that...

Should I apply for the next extension of my tourist visa if I have not yet received the result of the first extension?

You should file for an additional extension of stay with new, updated evidence of your continuing need to remain the US (even if you have not yet...

If your parents are applying for an immigrant visa overseas, the I-864 will be submitted to the National Visa Center at the appropriate time.

When does the I-693 need to be sent?

It should be dated within 2 months of when you submit the Form I-485.

At which USCIS office will the beneficiary apply for adjustment of status to lawful permanent resident?

If you are asking which address to submit the application, then note the instructions in the other posts. If you are asking which field office...

US citizens do not have alien registration numbers (aka “A numbers”).

Both the petitioner and the joint sponsor submit separate Forms I-864.