How do I enter Substantially Equal Periodic Payments (aka, 72-T distributions from my personal IRA) in TurboTax

[Critter-3]

Just enter the 1099-R and complete all the following screens in that section.  

[dmertz]

Be sure to click the Continue button on the Your 1099-R Entries page.  You can also go to Other Tax Situations -> Additional Taxes -> Extra tax on early retirement withdrawals.