Last month I did a total conversion of my sister's IRA and current holdings in 403b to a Roth.
Within the IRA, she had about $25000 of non-deductible contributions.
Which of the following is the correct taxable portion,using I for the money from the IRA and W for the contribution from the 403b?
T = I + W (1-25000/I)* I + W (1-25000/T)* (T)
I assume that further conversions from the 403b are not affected by the first conversion that included the non-deductible part of the IRA.