If i used my refund in 2018 to pay forward my 2019 estimated taxes, do i still list them as estimated taxes paid on my 2019 tax return?

If you are using the same account as you did in 2018, that amount may be in there already. Here is how to check:

1. Use the search box in the upper right corner to search for Estimated.
2. Click on Go to estimated tax payments.
3. Scroll down until you see, 2018 Refund Applied to 2019.
4. Click Edit or Start next to the type of payment you need to enter. 

If the payment is not already in there, add it on this screen. It goes on a different line of your Form 1040 than the estimated payment line.

Typing "Estimated" in the search box DOES NOT RETURN any result that says  Go to estimated tax payments.