I'm not a u.s. citizen have green card for 22 years, can i still petition my over ages sons and their families ?

If they are married, you cannot petition for them as an LPR.

It is well known that they always do a background check. In your case, you even had to give fingerprint, therefore, it will be very easy to find...

Wife withdraws petition on Interview but didn’t allege scam or sham. Is it possible for the petition to withdraw his i-485?

If the wife already withdrew it, I do not see a reason why the beneficiary has to also withdraw. However, if you plan to re-file, it is very...

I am 20 and wish to petition for my father to stay in the US, is it too late?

You can file in his behalf on the same day when you turn 21. It is a long process, but all possible.

It depends on your situation. If you still have the same passport that you had at the time you entered the USA, check the VISA in it, and put down...

Are you allowed to travel in an out of the US on an H4 visa or you have to live there ?

Yes, you are allowed to travel as long as the H1 holder, who is the principal, maintains his or her status.