There are several ways to change the estimate amounts. You could just cross out the amount and write in a new amount. Or print out the blank IRS 1040ES forms. Or just pay the amount you want directly online to the IRS.
Here are the blank Estimates and instructions…..
https://www.irs.gov/pub/irs-pdf/f1040es.pdf
Or you can pay on the IRS website. Be sure to pick 2024 1040ES payment
https://www.irs.gov/payments
Or go though the Estimated section again in your current return. But be careful not to change anything in your actual return.
In TurboTax Online, sign in to your account.
Select Tax Home in the left menu.
Scroll down to Your tax returns & documents.
Select 2023, and then select Add a State (you're not actually adding a state, this just gets you back into your return so you can make changes).
Then Go here,
Federal Taxes or Personal (Home&Business version)
Other Tax Situations
Other Tax Forms
Form W-4 and Estimated Taxes - Click the Start or Update button
Say No to W4. When you get to the W4 and Estimated Taxes section, say you want to adjust your income to go though all the screens.