How do I apply for a green card based on marriage and still keep my TN status until my green card is issued?

Your worry is valid. Immigration law does place limitations on what you can do until certain events occur.

If the bill is unpaid future visa requests by your other would most likely be denied. Chances of this affecting your immigration prospects are...

Emplyement green card PERM pending for 365 days - Can I switch employer now?

3. yes.

Hi,I recently got my H1B approved.How soon i can convert back to H4? does it impact my future working in USA?

You can change status as soon as you wish, if you are maintaining your existing status.

I hope you would talk to an experienced immigration lawyer with knowledge in criminal law BEFORE you file.

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Field visit from USCIS are efforts to ascertain the genuineness of your claim i.e. you are married. It appears your case file was lacking...

My H1 visa is sponsored by company A What if CEO want to change the payroll to another of his company B?

Your post is lacking the essential information. Your employer would know what this means and it is important for you to know exactly where you...

My aunt applied for green card family based and my father declined. Can I get GC in the future?

If your father came to U.S. and received the green card before giving it up, then yes. Your post is unclear about it.

My mother got us green card few days back. Is it necessary that first she should go to her sister,who filed petition for her ?

Most likely your aunt had given her address as your mother's place of residence and so your mom can go to her sister first and then change her...

Filing an I-751 waiver soon but have lack of evidence, what can I do?

Yes you can use the insurance info.