estimated tax from the year before. How to enter?

In 2018, my accountant did the return and stated:

 

“No tax is payable with the filing of this return. There is an overpayment of x of which y has been applied to your 2019 estimated tax.”

 

For 2019’s return and I am doing it myself on Turbotax, where can I enter y in Turbotax?

On Federal Tax -> Deductions and Credits -> Estimates and Other Taxes Paid -> Estimates, I saw one can enter the estimated tax by quarters. Since my payment from carried over from 2018. How do I enter it?

Thank you in advance!