Can a person reopen an immigration case after being deported in 2010? mother became a citizen when child was 17 yrs old

A child of a lawful permanent resident becoming a US citizen acquires citizenship.

Documents review time f4?

It is not uncommon for NVC to take 2 months (more and less) depending upon documentation then forward the file to the Consul for processing.

Maintenance of Continuous Residence following Legal Permanent Resident Status

https://www.uscis.gov/ilink/docView/SLB/HTML/SLB/0-0-0-1/0-0-0-11261/0-0-0-30960/0-0-0-30975.html

What steps do I need to follow for my wife to enter the states legally?

Generally, an attorney brings familiarity with the hardship waiver filing that is relevant to successful filings.

Can the i765 get approve with i485 pending?

I-765 can be delayed for I-485 documentation. However, current I-765 processing processing is generally 5-6 months at this time.

Issued 221g - H1b dropbox. Whats the Maximum time it takes to process?

The possible reasons related to a 221g for a H1 renewal are case specific. Consult with you immigration attorney.

Looking for sponsor?

I-864 co-ponsorship is a big financial responsibility usually supported by friends or family.

Can I apply for divorce here in California even I came here as a tourist?

A person physically present in the US in the jurisdiction of the state of CA may file for divorce. Consult with a family law attorney.

Can I get unlimited H1 extensions with one approved valid I-140, w/o new I-140 each time, till priority date becomes current ?

A person on H1 may receive unlimited H1 extensions with one I-140 approved and valid 180 days or more, w/o new I-140 each time, till priority date...

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How can I come back to the U.S?

A lawful permanent resident outside the US for several years may have abandoned their permanent residence. Consult with an immigration attorney.