by default the vouchers for 2025 ES calculated by TT assume that you are opting to pay 100% of 2024 tax thru withholding/estimated taxes (110% if AGI > 150k), and take into account your withholding based on the same amount as 2024.
the other option to avoid underpayment penalty is to pay 90% of your 2025 tax and provide estimates for withholding and other income etc for 2025; to figure this out you need to go thru the interview questions under Other Tax Situations / Form W4 and Estimated Taxes.
