Assuming that the traditional IRA contribution was for 2019, enter the traditional IRA contribution under Deductions & Credits -> Retirement and Investments -> Traditional and Roth IRA Contributions. (Do not indicate that you changed you mind and recharacterized the contribution to be a Roth IRA contribution instead.) If the traditional IRA contribution was instead for 2018, the traditional IRA contribution was required to be reported on your 2018 tax return.
Near the end of this month (January) you'll receive a Form 1099-R reporting the distribution from the traditional IRA. Enter the Form 1099-R under Wages & Income -> Retirement Plans and Social Security -> IRA, 401(k), Pension Plan Withdrawals (1099-R) and in the questions that follow indicate that you moved the money to another retirement account, that you converted the money to Roth, and indicate the amount converted.
