Turbo tax is giving me 2 different forms to file . on line 12b charitable contributions . Is it $300 or $600 for joint return?

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2021 version using the standard deduction.

[DanaB27]

For married filing jointly the amount is $600 as an adjustment to income (line 10b) if you made a cash contributions to a charitable organization, while claiming the Standard Deduction.

Please follow these steps to enter the charitable cash contribution for 10b :

1. Login to your TurboTax Account 
2. Click "Federal" from the left side of your screen
3. Click “Deductions &Credits” on the top (do not enter any donations under Charitable donations)
4. Scroll all the way down and click the "Wrap up tax breaks" button
5. Continue until the "Charitable Cash Contributions under Cares Act" screen
6. Enter your charitable cash contributions.

To verify your entry:

1. Click on "Tax Tools" in the left menu
2. Click "Tools"
3. Click "View Tax Summary" in the Tool Center window
4. Click on "Preview my 1040" on the left