I entered box 1 with the Gross Distribution box 2a left empty as the 1099-R was issued and there is not a box for basis but I check inherited in the ProConnect software. Where is there a box for "basis"? and how would I determine that amount as it is not indicated on the 1099-R. The only reason I know it was an inherited Roth as the client told me and then I inquired more from their financial advisor to find out more with regards to when the account was opened. The IRS states the 5 year rule applies from the date of the original owner (who is now deceased) and it was transferred to his daughter who is over 591/2 years of age. Do I just put a -1 in box 2a to override the taxability even though it has nothing reported in this box?