To calculate estimated tax payments needed for the current tax year (available to be done only with the early release version of the software):

1. From within your TaxAct return (Online or Desktop), click Federal. On smaller devices, click the menu icon in the upper left-hand corner, then select Federal.
2. Click 2018 Estimated Tax Payments to access the section of the early release program where you can estimate any estimated tax payments still required for the 2017 tax return
3. Click Yes to review the requirements for making estimated tax payments and the program will proceed with the interview questions for you to enter or review the appropriate information

Once the final filing version of the TaxAct software is released in January, you are only able to complete estimated tax information (or print vouchers) for next year's return (i.e. when the final filing version of the 2018 TaxAct program is released in January 2019 you can only calculate or print vouchers for payments to be made for the 2019 tax return and can no longer use the 2018 software to create a voucher or estimate the payment needed for 1/15/19). 

In order to calculate the payment for 1/15/19 or print the voucher, use your 2017 TaxAct program. You would then have the option to print the voucher to mail the payment to the IRS or use EFTPS Online.