If you need to pay your estimated taxes, you can do that directly to the IRS at http://www.irs.gov/payments

If you need to calculate your estimated payment requirement, you can do so following the directions below:

You can calculate your 2019 estimated taxes and generate the payment vouchers by doing this:

1. With your tax return open (after you login), search for 1040-es (be sure to include the dash) and select the “Jump to” link.
2. Answer No to the question Do you want to change your W-4 withholdings for 2019?
3. On the next screen, Review Your Estimates, select Review Now. Answer the questions about things like your 2019 filing status, income, and deductions.
4. Eventually, you'll come to the Print Vouchers? screen. Answer Yes and we'll include your 2019 1040-ES payment vouchers when you print a copy of your return later.