question about concurrent filing 485

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Registered Users (C)
Hi ALL
I have a question about concurrent filing i-485. My I-140 NIW is pending for 5 months till now, may I file i-485 as a concurrent filing? And can we file the i-485 by myself instead of asking my attorney to do so? we asked an attorney to file i-140 before. Thnaks.
 
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