The best course of action is likely the N-470, the application to preserve residency.

Could someone please explain military and citizenship/greencard

The pathway to citizenship may be faster if you meet certain conditions. Have you tried calling the USCIS military help line? 1-877-247-4645

What should I write for the question 'purpose of trip'? Should I write "work reasons".

Yes - provide an accurate response to the question.

Why does my mother needs my Alien number to file for her I-360 form when I obtained my A# through my marriage.

The form simply asks for information about the children of the petitioner, which would include your information. If you have concerns about her...

I agree with the other responses. There is no need to sign the cover letter, it is simply for information and organizational purposes.

Submitted I-130 and I-485 concurrently. Went for interview on Jan 26. Went great- got approved.

How frustrating. Your EAD is valid until the expiration date on the card. Be honest with all involved and make sure your employer has a copy of...

Is there any was I can replace them Legally

Both of these cards can be replaced. As for the green card, you will likely need to file for a new card based on your old card being lost or...

How do I qualify under this rule to become a US citizen.

You should be able to get a passport by showing that you were under 18 when your mom became a citizen. The passport will allow you to prove...

I-730- How can I proceed to the next step since USCIS denied her from following to join me?

I suggest getting the advice of an immigration attorney. Your options will depend greatly on the USCIS findings in your initial follow-to-join...

My parents filed i485 and aproved in carlifornia, Can I apply i485 in Seattle because I am studying in Seattle.

I agree with the previous answers. Filing is not based on state of residence.