After you file

OK, got a question. I'm in the same boat: filed on 2/22, still processing, with a figure (I think it's the correct one) in Line 30. Anyway, I've been using TT since the DOS versions (over 20 years ago?) and never had significant issues. So, I am using the desktop version (TT Deluxe). Assuming there is an error, how do I even get a refund and how much would it be? There is the cost of the program ($50 or $60, I need to check) and the cost of filing my State return (which went through flawlessly, refunded within 10 days). So, HOW to get the refund. One other question: for those of you notified of a specific discrepancy, were you then given a refund date?