Mistake in I-130?

You may be able to correct at the interview. Also, each immigrant has to be individually petitioned for.

I did the D-260 last night and I made a mistake and is already submitted is any way I can fixed it?

Submit an inquiry through the NVC website.

Yes, 12 months is a long absence and is considered an abandonment.

Can we (as greencardholders) move to USA after 12 month-period with no enterance-exit?

You can attempt reentry with good evidence as to your reason for being away. It is advisable to privately insult with an immigration attorney.

Should i answer "yes" to the question of serving military on N 400 form if serving military was out of US?

Yes, if you've ever served in any military. You can also explain further at the interview.

Want to travel to India on nov 2020 but my I-751 is on pending and my I-797 also have 6 month remain to expire ?

You can travel using your receipt notice. You may also be able to get a stamp in your passport. Call USCIS customer service to find out if they can...

A Class C misdemeanor is not a felony

I would like to know what I can do if my point of entry visa expires because I have been in the US for 6 months now ?

You can file an extension of status asap.

Does a spouse living abroad required to sign form I-130A?

You can leave the signature blank. A scanned signature is also permissible.

Can my wife sign form I-751 two months before filling date?

Different signature dates may raise questions in the officer's mind.