"I don't know if I had a roth for more than 5 yrs before 2019."
That's not what TurboTax is asking. TurboTax is asking if you simply had a Roth IRA at any time before 2019, no matter how long before 2019. If you had a Roth IRA before 2019, you will have received a Form 5498 and account statements from the Roth IRA for some year prior to 2019.
