Concurrent filing means filing simultaneously or in US immigration
What is concurrent filing?
What happen to the status of I-485 if underlying visa petition is rejected?
A person must prepare all the forms which he intends to file concurrently (say I-140 and I-485) along with the required supporting documents to be filed together and applicable fee and mail these to USCIS.
Premium Processing in EB-1 Application
Premium processing is filed under I-907 by those who have urgency and cannot wait for normal process time.