No. This is an extension payment made 7/15/2019 for 2019. I am emending my 2019 1040 with 1040X. Among other things, I did not report my extension payment and added Schedule 3 which explicitly has a line for 2019 extension payments made. Before I edit this line, my "due" is 401. After I enter that I paid 500 originally not reported, I am expecting "due" to become "refund" and for it to be 99.
I contacted turbotax support and they said extension payment correction/input may not be supported for 1040X at this time. I see this as a bug though, and would make the filing inaccurate as is. Not sure how this plays with their "accuracy guarantee".
