leave 10b blank.
the contributions have to be listed as "money" contributions"
In order to take this above-the-line deduction, enter your donation(s) under Deductions & Credits > Charitable Donations > Donations to Charities in 2020. The deduction will be added above-the-line by TurboTax after you have completed the Wrap up tax breaks interview in TurboTax if you take the Standard deduction.
until the wrap up Turbotax doesn't know if the standard deduction is better than itemizing.
