Not allowing me to efile. Keeps giving me error "charitable contributions should be blank" even though the number is $300

This is a know bug and has been reported.  Go ahead and clear the amount entered.

Go back to the Deductions & Credit section for charitable donations and enter the cash contribution in that section.  That should correct the problem.

To enter charitable donations -

• Click on Federal Taxes (Personal using Home and Business)
• Click on Deductions and Credits
• Click on I'll choose what I work on (if shown)
• Scroll down to Charitable Donations
• On Donations to Charity in 2020, click on the start or update button

Or enter charitable donation in the Search box located in the upper right of the online program screen. Click on Jump to charitable donation