Would filing taxes as a hair stylist affect my green card application?

Unauthorized employment does not affect resident status application based on marriage to a US citizen

H4 EAD based on spouse I140 approval

Yes it may be possible to change to H-4 and obtain EAD. Speak with you immigration attorney

Do I need to have dependents also with me for the H1B Drop Box submission?

Your employer's immigration attorney or your own should guide you through the process. If not check with the US consulate directly

Is it possible with EB2 with 15 (10+2+3 ) years education, if not what I have to do to make it 16 years education .

4 year bachelor plus advance degree or advance degree equivalent.

Is it possible to get back a green card after it has been seized.

it may be possible but she should discuss her situation with an immigration attorney as details are needed.

You have the options of any married person to continue the marriage or not continue the marriage. USCIS, ICE and possbile an Immigration Judge will...

This may be corrected as my colleagues have noted.

Not an immigration question but generally yes. When you obtain the record have the record certified.

Should I withdraw my application of N400 form to become US citizen because I put the wrong entry of my selective service?

No need to withdraw. Disclose your error to the immigration examiner at the time of the interview.

I came here in 2002, I was 10 years old. I got Daca in 2012. I just for married to a permanent resident. I have a question?

If your spouse becomes a US citizen it is likely the process will be faster. Also it may be possible to proceed without a waiver. Speak with an...