TurboTax did not include my 2021 1040-es contributions in withholding. How did they miss this?

TurboTax has no way to know whether you actually paid estimated taxes during 2021 or not. You must enter the taxes paid when you are completing your tax return.  They are not entered as withholding on your tax return. They are entered as estimates amounts paid and the dates you paid them.

To clarify:

1. Did you make estimated tax payments for 2021? 
2. If so, did you enter your estimated tax payments into TurboTax?

Please add more details and we can better assist your specific question.  To enter estimated tax payments in TurboTax you can use the link below.

• Where do I enter my estimated tax payments?

TurboTax never provided an opportunity to enter these pre-payments.

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@roryctrumbore05 wrote:

TurboTax never provided an opportunity to enter these pre-payments.

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To enter, edit or delete estimated taxes paid (Federal, State, Local) -

• Click on Federal Taxes (Personal using Home and Business)
• Click on Deductions and Credits
• Click on I'll choose what I work on (if shown)
• Scroll down to Estimates and Other Taxes Paid
• On Estimates, click on the start or update button

Or enter estimates paid in the Search box located in the upper right of the program screen. Click on Jump to estimates paid

 

Or click on Tax Tools on the left side of the online program screen.
Click on Tools
Click on Topic Search
Type in estimated tax payments, click on GO

 

Federal estimated taxes paid are entered on Form 1040 Line 26

The opportunity to include estimated payments never presented itself.  I had only these options:

Mortgage Interest and Refinancing (Form 1098)
Property (Real Estate) Taxes
Donations to Charity in 2021
Car Registration Fees
Medical Expenses

It is in the Deductions and Credits section below Medical under the Estimates and Other Taxes Paid heading.