If you withdrawal from a Roth IRA but the amount was from previous IRA contributions, then the withdrawal is not taxable and not penalized. My brokerage has no way of knowing how much I've contributed previously in all my prior tax years, so they always indicate the withdrawal as 100% taxable even if it isn't. TurboTax has a way to mark the distribution as non-taxable but FreetaxUSA does not.
On the other hand, the 1099-R does have "taxable amount not determined" checked, so can I just manually fix the taxable amount to 0? I don't see any other way to fix this.