If you cannot make the change in the 1099-R interview, use the "Delete a Form" tool to
remove the 1099-R (and any
associated worksheets).
See: How do I delete forms in TurboTax Online?
After
deleting the 1099-R (and any associated worksheets), log out of the program. When you
log back in, use the Delete a Form tool (List of Forms in My Return) to confirm
they have been removed from your return. Then, go back to the Retirement
Income and Social Security interview to add the 1099-R back in.
