Retirement tax questions

Thanks for your response. I do have balance in Traditional IRA at the end of December 31 2023. I can calculate based on the remaining balance in Traditional IRA at the end of 2023 using pro rata rule, and the already taxed amount converted via backdoor Roth, my question is, what do I enter in TT to get the portion of the backdoor Roth that is taxable income? Currently it shows zero taxable income based on the answers provided to TT questions, and I know zero is not correct.