I paid $1176.00 estimated tax. How do I get that back?

[JulieR]

If the estimated tax payments you made in 2018 caused you to overpay your tax due for the year, you will be entitled to receive a refund of the excess when you file your return. 

[VolvoGirl]

Did you enter them?  They are included in your refund or reduced a tax due

You can type estimates paid in the search box at the top of your return and click Find and it will give you a link to Jump To it.

OR
To enter Federal or State Estimated Taxes Paid, including a state estimated payment made in January for the prior year, go to
Federal on left or at top.  Personal (Home & Business)
Deductions and Credits at top
Then scroll way down to Estimates and Other Taxes Paid
Estimated Taxes - click the Start or Update button

Estimates paid will be on Schedule 5 line 66 which goes to 1040 line 17.