I've always had problems e-filing for my elderly parents- something about their names and Social Security numbers and changes in protocol since 9/11. However, now my Dad has passed and I thought e-filing for my Mom would be easy. Her prior year AGI is perfect, but the 2019 tax return had my Dad's social security number as primary, although Mom's was listed. The return is pretty simple, but it has been rejected 3 times. I've rechecked the date, AGI. What else might be wrong?
