You should fill out your information either in the TurboTax program (the easiest way), and it will calculate your estimated tax payments (as well as print your quarterly vouchers) or you can go online to the IRS website and fill out, calculate;, print and then mail your 1040-ES form.
If you want to add Form 1040-ES vouchers to your return yourself, follow these instructions.
Mail your payment along with the corresponding 1040-ES voucher to the IRS address listed on the voucher. Quarterly payment due dates are printed on each voucher.
Additional estimated tax payment options, including direct debit, credit card, cash, and wire transfer, are available at the IRS Payment website.
You also have the option when you file your return to apply some or all of your refund to your estimated tax payments for the coming tax year.
TurboTax FAQ: How do I make estimated tax payments?
IRS - Estimated taxes
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