My brother and sister are US citizens. My mother has a green card .I want to apply for green card what's the process

Your mother as a LPR can not file for married son and siblings I-130 have long wait times. It depends on the country you belong to. You should...

Change of status from H4 to F1 during the time when H4 to H1b is applied

All the selected H-1B petitions have been issued file numbers, H-1B probability is very low at present. Any way, you can choose whichever petition...

Immigration question. How far I can go back to supporting documents

J-1 question is specifically asked in the Form I-485. It's always good to send copies of all the documents you have for F-1 or J-1 visa....

Do I Need A Immigration Attorney?

It always helps to have an Attorney at least consult with one before filing it. I think you are talking about Resident Card renewal.

it depends on your time left out of maximum six years. You can ask an attorney whoever will take care of the process.

Is it OK to travel on visitors visa while I-130 from a Green Card holder spouse is pending?

It depends on the officer at the airport, they can stop you or even ask to leave. I-130 has an immigrant intent and Visitor visa is nonimmigrant...

My wife entered the u.s with false name.

These issues are very complicated, you should consult a lawyer. she might be able to file Waiver for it.

Question about visa stamping while on OPT?

If you have valid OPT, employment letter, pay stubs showing employment, there should be no problem.

Birthplace on marriage certificate of my wife is different

You should be fine, you can expain the mistake to officer and show birth certificate and passport.

Don't worry, USCIS does not deny application based on it. You can explain and give the information at the time of interview.