@VikingEric wrote:
I still think there is a bug here. It accepts an entry of $600 for married filing jointly, but does not update 1040 10b correctly. Seems to max out at $300.
Charitable donations: The 2020 CARES Act created a $300 above-the-line deduction for cash charitable donations for 2020 tax filers who don’t itemize deductions. The CAA increased this to $600 for married couples, and extended the deduction through 2021.
The maximum above the line charitable contribution for tax year 2020 is $300. For tax year 2021 the maximum will be $600 if filing as Married Filing Jointly.
IRS Form 1040 (2020) Instructions page 29 - https://www.irs.gov/pub/irs-pdf/i1040gi.pdf#page=29
Line 10b
If you don't itemize deductions on Schedule A (Form 1040), you (or you and your spouse if filing jointly) may be able to take a charitable deduction for cash contributions made in 2020.
Enter the total amount of your contributions on line 10b. Don't enter more than:
• $300 if single, head of household, or qualifying widow(er);
• $300 if married filing jointly; or
• $150 if married filing separately
