Enter Prior Year Roth IRA Contributions

I contributed $18500 to a Roth cumulatively before 2014,  plus did some taxable conversions in 2012 through 2014. I withdrew $35,000 in 2017 and $30,000 in 2019 from the Roth. So when TT asks for Roth IRA Contributions prior to 2019 (and TT automatically put in $18500), what is the correct answer? Zero, because by definition all of the contributions are gone and only the conversions are left?