If you have no IRAs, you have no need for Form 8606.
Examine your Forms 1099-R. If any have the IRA/SEP/SIMPLE box marked or have code J, T or Q in box 7, you do have an IRA (or at least had one at some point in 2019). If none of the Forms 1099-R indicate that you have an IRA, revisit your 1099-R entries to make sure that you have not mistakenly marked the IRA/SEP/SIMPLE box on TurboTax's 1099-R form.
If you made no contributions to IRAs, make sure that you have made no entries under Deductions & Credits -> Retirement and Investments -> Traditional and Roth IRA Contributions. If your TurboTax tax file includes the IRA Contributions Worksheet you can simply delete that worksheet to eliminate any IRA contribution entries that you previously made.
