After enter the Form 1099-R reporting this distribution, click the Continue button on the Your 1099-R Entries page. Answer Yes when TurboTax asks if you made nondeductible contributions to your traditional IRA, then enter or confirm your basis from (generally) line 14 of your most recent previously filed Form 8606. Also, enter your 2019 year-end balance in traditional IRAs. TurboTax will use this information to prepare Form 8606 Part I to calculate the nontaxable and taxable amounts of the distribution and will show the remaining basis on line 14 of your 2019 Form 8606.
