This is still an issue in TurboTax 2021 Deluxe. Married Filing Jointly will after running Federal Review and Smart Check show the correct deduction of $600 on Form 1040 /1040 SR on line 12b. However, after completing State Taxes (no errors) and running Analysis line 12b reverts to $300 on Form 1040/1040 SR which results in an Error: "Charitable contributions has an unacceptable value". You can correct it on the form, however when you run Analysis again it will revert back to $300. If you skip running Analysis you will not see the error and the 1040 Form will show the correct $600 amount. You can save all the forms and file them this way however if you go through Analysis again the amount will revert back to $300. I have tried deleting all of the charitable contributions and then re-entering them and the form shows the correct amount. However, the minute you run Analysis it will revert Form 1040 line 12b to default $300.
Pretty sure this is a form/program issue.
