If you want to use your current 2018 return to estimate the quarterly payments you can put down $1 for the 1st & 2nd quarters so it will only calculate the 3rd and 4th quarter.
Go to
Federal Taxes or Personal (Self Employed or H&B version)
Other Tax Situations
Other Tax Forms
Form W-4 and Estimated Taxes - Click the Start or Update button
Say No to W4. When you get to the W4 and Estimated Taxes section, say you want to adjust your income to go though all the screens.
