After you file

Yes, I'm having a helluva time.  Taken me all day to find that when I saved a pdf of return, it filled in different items in different boxes than on the actual.  And, also, lines re recovery rebate are all wrong.  So now i'm getting letter from IRS and they've cut my refund by $1000's.  Makes me wonder what other glitches there have been over the years?!?!