I am just about to submit via Turbotax but have decided not to estimate taxes for 2025. How do I change this?

Yes, you can make the change using the steps below to eliminate your 2025 estimated tax.

1. Sign into your TurboTax return
2. Select Other Tax Situations > Select Other Tax Forms > Select Form W-4 and Estimated Taxes > Start or Update
3. Continue to the screen 'Estimated Taxes for 2025'
4. Go through the screens to remove any amounts then when completed you can go back to select 'No' for 2025 estimates

If Turbo Tax prints out the 1040ES estimates they are optional to pay.  They don't get sent to the IRS or state so they won't be expecting them.  You can ignore them and shred them.