you should try your best to get an evl from your hr.
this is considered "initial evidence".
effective this week, uscis is more liberal to deny a case now without issuing rfe and/or noid.
from i-485 form instruction:
Employment Letter.
If your adjustment of status application is related to anemployment based visa petition (Form I-140), youmust a letter on the letterhead of the petitioningemployer which confirms that the job on which thevisa petition is based is still available to you. Theletter must also state the salary that will be paid.
this is considered "initial evidence".
effective this week, uscis is more liberal to deny a case now without issuing rfe and/or noid.
from i-485 form instruction:
Employment Letter.
If your adjustment of status application is related to anemployment based visa petition (Form I-140), youmust a letter on the letterhead of the petitioningemployer which confirms that the job on which thevisa petition is based is still available to you. Theletter must also state the salary that will be paid.