How many sponsors I should put in if I cannot remember it clearly?

Just enter the information to the best of your recollection.

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Traveling on O-3 without AP, thereby abandoning my 485 application, can I apply again in the future?

Yes, you can file another I-485 without penalty.

How to change my visa ?

You do not need to cancel your J-1 visa. Just have your new employer apply for a change of status to H1-B.

I agree with my colleagues. Because you are marrying a US citizen and entered the US legally, any overstay or unauthorized employment will be...

I agree with my colleagues. You can work for another 180 days after a timely-filed renewal application.

Generally, as long as you file your tax returns when due and you are in a payment plan for the taxes that you still owe, that will not be a reason...

This minor traffic incident should NOT be a reason for the denial of your citizenship application.

Will I need to do affidavit of support again or just need new IRS transcript for new year?

Yes, you should file your taxes for 2020 and send your wife a copy.

Married to US citizen for 5 years. Can I get the permanent green card?

I agree with my colleagues. Because you have been married for over 3 years, you will receive a permanent green card. You can apply for citizenship...

I am sorry that your marriage did not work out. Getting divorced will not have any effect on your statuses.