The South Carolina tax calculation has an error. It does not add back the charitable contribution amount filed with federal standard deduction. When will this be fixed?

You can manually add back the charitable contribution allowed on your Federal return for taxpayers claiming the standard deduction.  

When going back through your SC return, click Edit beside the Income section on the page titled, 'Your 2021 SC taxes are ready for us to check'.

On the Income page, scroll to the bottom and click Start beside Other Additions.  This will allow you to enter a description and an amount for the charitable contribution that will be added to your SC income and reported on Line e as 'other additions to income'.  This will nullify the deduction with respect to your SC return.

There is no known information regarding the program being changed to automatically add this deduction back to the SC return.