AGS for the year ending 2018

[TES3]

In 2018 initially I submitted electronically AGS as $185171 and IRS accepted it . Since I missed entering one of the 1099R for an amount  $6418, I submitted an amended 1040X return using Turbotax and I had to separately pay $128 to IRS as they already refunded direct deposit based on the original amount of $185171. In the amended return 1040X the correct amount of $191589 is reported and the amount I owe to IRS of $128 was attached by a check with the amended return.

Perhaps IRS or your files are using only 1040 old version. The correct amount of  $191589  can be seen in the 1040X file which was also generated only using turbotax

[LeonardS]

If you amended your 2018 tax return you will use the AGI from the unamended 2018 tax return when you file your 2019 tax return.