Applied for n400 but last five years only have one trip but 200 day I sent with my application my lease for last 5 years that u

Absences of more than six months but less than one year may disrupt an applicant’s continuous residence unless the applicant can prove otherwise....

It is currently taking a very long time to get an interview; up to 2 years in some cases.

Can I travel??

There is currently a ban for entering the USA from Brazil. You can quarintine in the third country before entering.

Generally, you will receive a license with an EAD and SSC. However, check with the individual offices for their requirements.

It is always a risk that he may be asked to show a valid status to be in the USA.

Can my friend apply for US citizenship, if he only has the "Welcome Letter" confirming the Approval of the Green Card?

Your friend is an LPR even though he does not have a card. In my opinion he will need the card to be granted Naturalization. He needs to apply for...

OPT/H1B/I539 Immigration Question

Fle for an extension ASAP. As long as timely filed you will be fine to remain in the USA while waiting a decision.

The confirmation is all you will get. Yes file your N-600.

What can I do?

An attorney will need to review your file to advise you regarding your situation. In the event the decision is not in your favor you should...

I came to US on student visa and married to US citizen so do I have to leave US after filing I-30?

You may file to adjust status at the samew time your spouse files the I-130. Ypu may also file for an EAD and Travel Document. Provided you meet...