How do I file my tax return when i divorced a foreigner this year prior to her going through immigration and getting a SS/ITIN?

This is not an immigration question and should be posted under tax section of this forum.

Is it sufficient that my ex claims an asset obtained during marriage was gift/inheritance when its rentals came to joint accnt?

Ownership and distribution or rights to rental income are separate issues and both are fairly complex. You should obtain legal counsel as soon as...

Where can I find Alien Registration Number?

This should be listed on your OPT and likely on your H1.

NVC - CHECKS STATUS

You can call or email the NVC regarding your case status. Due to high volume of calls, wait times may vary.

Who can I appeal to if USCIS has delayed the process ? What options do I have etc.

You should contact the USCIS customer service to see what's going on.

How long does the approval process take for the I-130 petition?

The process takes five to seven months in most cases. Based on the information you have provided, you could have filed the I-130 and I-485 at the...

Is affidavit needed for slight change in name on original and translated school certificate?

You should attach the affidavit from your father.

Why 2 judgement package received? Mistake? Is my file back at the bottom of the pile with the court? Is my case on track?

Looks like the judgment was resubmitted on 02-01-2016. As my colleagues pointed, it will take several weeks.

You should comply with the request and be sure to have the documents available at the time of interview as requested.

Can I apply for the N-600?

Yes, but only if your father resided in the United States for requisite number of years before you were born.