I have the same issue in that the SC tax electronic tax filing was rejected because the TC-38 was not attached. I believe SC is in error since their instructions have always clearly stated that the form was not required in electronic filings (only paper) but retained for records. This is the third year I have filed using this credit but the first time it was rejected. I always file electronically. (Since the credit is limited but can carry over for up to 10 years, it will take me four years to recover the ITC for my solar array). The response from Turbotax was less than helpful: file by paper or don't take the credit (which is over $2K). I want to avoid filing by paper. It's been so long, I don't remember how. On a related note, in the three days since I tried to file electronically, Intuit updated the SC forms to add the $300 CARES charitable deduction back to SC income, thereby changing the tax liability and the numbers on TC-38.
