1040/1040sr charitable contributions has as unacceptable charitable contribution. Icant figure out what i am to do?

You may have entered the allowable charitable contribution amount in the CARES Act section with claiming the standard deduction  instead of entering it in the typical donations section. 

To get past this issue, TurboTax will need to update. It interprets any entry in the CARES Act Charitable Donations section as an override if it was entered before entering any donation information.

To fix this, follow these steps:

Step 1: Delete the Charitable Organization donation sheet

• From the left menu, select Tax Tools.
• Select Tools.
• Scroll to Delete a Form.
• Scroll to Charitable Organization and select Delete, Delete Selected Form, and Continue.
• Select Federal from the left menu to return to your program.

Step 2: Re-add the Charitable Organization cash donation entered.

• Enter Charitable contributions in the search box.
• Select the Jump to link in the search results.
• Answer the questions in the interview.
  • Only Money donations count toward the above-the-line deduction when taking the standard deduction.
• Complete the interview process by answering all donation questions and scrolling to the end of Deductions & Credits to select Wrap up tax breaks.
• Select Continue at Based on what you just told us, the Standard Deduction is best for you.
• At Charitable Cash Contributions under Cares Act, you will see your full cash contributions already input in the box. Do nothing to this cell. Select Continue and Continue.

This process will allow you to claim up to $300 for all taxpayers except married filing separate, who would each have a maximum of $150 without itemizing deductions in 2020.

For more information, see IRS Charitable Contributions Deductions.