"Can you please tell me where to enter the year-end balances in IRAs? I can't find any clues."
TurboTax will ask for this after you click the Continue button on the page that lists the Forms 1099-R that you have entered and you indicate that you have basis in nondeductible traditional IRA contributions. TurboTax will then place your entry on the IRA Information Worksheet. Entering the amount on the IRA Information Worksheet in forms mode will accomplish the same thing.
