If you have owned that Roth IRA for more than 5 years and distributions are less than your prior contributions, the distribution is not taxable. Make sure that you indicate that you owned the Roth IRA for more than 5 years. And also enter your prior contributions in the TurboTax interview (see attached screenshot).
You can then preview your 1040. To do this, click on Tax Tools in the left-hand column. On the Tax tools page, click on View Tax Summary. Then click on Preview 1040 in the left-hand column. You should find the amount of your distribution on line 15a. Taxable amount on line 15b should be 0.
If you have owned that Roth IRA for more than 5 years and distributions are less than your prior contributions, the distribution is not taxable. Make sure that you indicate that you owned the Roth IRA for more than 5 years. And also enter your prior contributions in the TurboTax interview (see attached screenshot).
You can then preview your 1040. To do this, click on Tax Tools in the left-hand column. On the Tax tools page, click on View Tax Summary. Then click on Preview 1040 in the left-hand column. You should find the amount of your distribution on line 15a. Taxable amount on line 15b should be 0.