To enter your State Estimated Tax Payments navigate to the Federal section of TurboTax and select Deductions & Credits.
From the Deductions & Credits screen navigate to "Estimates & Other Taxes Paid."
There you will see five categories. Click on the first one, "Estimated Tax Payments."
That screen also has five options. Select the second one, "State Estimated Taxes for 2019"
Select YES to the first question you are asked and it will take you to a screen where you can enter the State to which and date you paid estimated tax.