Can I still renew my DACA even if it expired 6 months ago.

Yes, you can renew your DACA. Go to USCIS website for instructions

I am a legal immigrant.... Came on a plane and over stayed by 3 years...... Can my Bf marry me..... He is a US citizen...

Yes you van and, since you appear to have entered the us legally, even though you are an overstate once you get married here in the us, your ctizen...

With a marriage fraus coniction there is almost no possibility that your friend will be able to stsy in the US.

Can you petition your adult unmarried child who was adopted as a baby to come to the US? Biological mother is a US citizen.

Biological parents cannot file visa petitions for an offspring who has been legally adopted by someone else.

I mean I am not sure when I will return to US. Can I sponsor my sister's green card. I am a naturalised US citizen

Yes but you must have a US residential address and your sister will probably have to wait around 12 years for her F-4 classification to become...

I will receive an OPT in 3 months. Should I apply for TPS as well?

Having TPS will not affect your eligibility for status because TPS, despite having the word "Status" in its name, does not, in fact, confer status,...

You won't have to submit new I-751 waiver, though you could. What you need to do is send in a copy of your divorce decree and ask that your already...

I'm married to a us citizen is it possible for me to get a visa to visit him

A B-1,B-2 visa? Probably not as you would be deemed an intending immigrant. Your husband could, however, file an immediate relative visa petition...

New employer files for PERM And I140 but in the mean time the priority date becomes current. Will the priority date stay?

Yes, you can keep the old priority date from the first I-140 as long as there was no fraud involved in the original.

While my asylum application is pending and before I receive my first work permit can I work in the United States?

You cannot work until you receive your work authorization.