Thank you for responding. I understand that I need to fix a PDF but, despite looking all over in TurboTax and using the search feature, I have no idea where to see a list of the numerous PDFs I uploaded nor, if I could find them, how to delete one and replace it.
TurboTax, this is a significant failure in your usual excellent functionality. Your error message should say which PDF and offer an easy way to replace it with a fixed one. I give up trying. I printed out my returns and will mail them in old school. :(
