"IRA withdrawals use the same tax form and if you redeposited part of a withdrawal you made it would also appear on line 5."
I think you mean box 5 of Form 8606. Box 5 of Form 1099-R is not used for any Form 1099-R for a distribution from an IRA. If the Form 1099-R has the IRA/SEP/SIMPLE box marked (or has code J, T or Q indicating a distribution from a Roth IRA). For a distribution from an IRA, TurboTax will ignore whatever is in box 5 since box 5 is meaningless for such a Form 1099-R.
