The software is really buggy in this area.
Basically, 1040/1040SR Wks line #12.b should have the lowest of the following three.
$300 or $600 (for married) or the actual donation amount.
Now software picks up always $300 no matter what we enter and then rule check function errors out because in some cases your actual amount is lower than 600 or 300 and default $300 is wrong so it asks you to fix which is OK.
Then if you type the correct amount, then it goes and corrects it in 1040SR line #12.b and if you move forward with filing, then everything is fine. Your return is correct.
But many of us including me pick up the option to re-check for errors and when you do that software goes back and revert that amount to 300 again and the error check function returns the same error so a lot of users are reporting the trick is not working.
The correct way to move forward is this. When you see the error, then correct that amount, then double-check the form 1040SR line #12.b by clicking on the "Forms" menu on top and see it has the correct amount, and then continue with filing. Do not run an error check again. If you have multiple other errors in your return, then fix this one as last.
I understand some rules are not finalized for the charitable amount but the software should not revert back what user entered which is driving everyone crazy.
