1040x Tax Amendment - Taxes paid with original return

I'm amending my 2019 tax return, and facing a question on my state return.  Numbers below are illustrative.

 

Line 29 "Total amount paid with original return and additional tax paid after return filed" is showing $1200, but what I've actually paid is $200, and whatever adjustments I make manually, it gets overwritten to this number whenever I generate the amended tax return report.

 

Does anybody know how this $1200 number is being calculated/derived from, and should I simply rely on the calculation that TurboTax is giving me?  Is it taking into consideration State Tax that I'm paying in 2020?