When using a safe harbor method to calculate qualified disaster loss, instructions say to leave Line 5 and Line 6 blank on Form 4684 and enter the loss amount on Line 7.  I had to leave applicable worksheet lines blank (causing an error) and override Line 7 on Form 4684.  Now I have 4 "You Must Fix This Error"(s) on the return.  I can efile with "ignore errors" but am I missing a worksheet or the "right" place to enter this information?

Oh, and do I need to get signatures on the Sec. 165(i) election (deduct loss on preceding tax year) and attach as a pdf, or does the signature on Form 8879 serve as the election signature?

Thanks!