An employer may sponsor you for a green card when you are in OPT status. An offer of employment for permanent residency is for future employment. ...

N-400 filed 10 days ago, and haven't gotten the return receipt yet

Don't worry. If the check has been cashed, it means the application was receipted by USCIS. The I-797c notice of action should arrive soon.

What can I do?

I agree with my colleagues that you need to follow up with USCIS by mail and in person. If there was an interview, did your brother get the name...

Can an international student file for permanent residency?

Generally you need to have been permanent resident (green card holder) for 5 years before you can apply for naturalization (U.S. citizenship). ...

Is it a Must ?!

The key is that you get the green card. The welcome letter is only a notice - it cannot be used to prove your permanent resident status.

Greeting letter

Generally, somebody who has been granted "adjustment of status" (or permanent resident status would get a "welcome letter" from the USCIS.

My I751 been pending for 15 mos they told me its due to security checkS.

Yes, one may file the N-400 whenever he or she becomes eligible even if the I-751 is pending.

What can be done in H1B 6th year to continue work

Section 106(b) of AC21 authorizes approval of 1-year extensions of H-1B status beyond the 6-year maximum period if 365 days have passed since the...

Should we file i 130 and i 485 together

I believe you are asking whether your husband should file the I-130 on your behalf, and you'll be filing the I-485 at the same time based on his...

L2 EAD- i765- extended review- been more than 90 days

Did you get a request for evidence for the EAD application? I agree that you should try to schedule INFOPASS appointment with the local USCIS...