@AliciaP1
Thank you!!! That did it! I was able to e-file successfully!
For anyone else who reads this thread, the "Total miles driven for all purposes" field in TurboTax corresponds to line 5c on the Car and Truck Expenses worksheet.
@Superfly I recommend trying the approach suggested by AliciaP1 - it worked for me, and it kept the worksheet in my TurboTax file.
