Get your taxes done using TurboTax

There are some flaws in your process.

• The easiest way to do this is to allow TurboTax to make the calculation. 
• You can exclude the stock sale from it, but include the 1099 income.

You can prepare estimated taxes for next year.

Start on the left sidebar menu

1. Under Federal
2. Select Other tax situations
3. On the center drop down select Form W-4 and Estimated Taxes
4. Adjust How Much Tax You Pay - No
5. Estimated Taxes for 2025 - Prepare Now
6. Continue the interview.

TurboTax can calculate next year's federal estimated taxes?

Also see the IRS Website Make a payment