i've managed to fix my and got it efiled. pull your transcript and look at all the transactions that took place - including any code 612 - Removed payment with return.
enter all payments and credits exactly in box 16 and 18
in my case on the original return there was a payment due - that was paid. but for whatever reason the transcript
Code 613 - payment with return
Code 612 - removed payment with return
Code 670 - payment with return
on the 1040x box 16 - i entered both the amount for code 613 and code 670
box 19 - i entered the amount for code 612
the 1040x is also generating a refund
efiled and it went through with no problem this morning
