Per the IRS Instructions for Form 1120-W Estimated Tax for Corporations, page 1:
Who Must Make Estimated Tax Payments
For S corporations, per the IRS instructions for Form 1120S U.S. Income Tax Return for an S Corporation, page 4:
Estimated Tax Payments
Generally, the corporation must make installment payments of estimated tax for the following taxes if the total of these taxes is $500 or more: (a) the tax on built-in gains, (b) the excess net passive income tax, and (c) the investment credit recapture tax.
The amount of estimated tax required to be paid annually is the smaller of: (a) the total of the above taxes shown on the return for the tax year (or if no return is filed, the total of these taxes for the year), or (b) the sum of (i) the investment credit recapture tax and the built-in gains tax shown on the return for the tax year (or if no return is filed, the total of these taxes for the tax year), and (ii) any excess net passive income tax shown on the corporation's return for the preceding tax year. If the preceding tax year was less than 12 months, the estimated tax must be determined under (a).
If you have determined for your situation you need to set up estimated tax payments, follow the steps below to enter the information in the TaxAct program:
Once you have completed that section of the Q&A, you can e-file them with your return or you may set up payments through the IRS Electronic Federal Tax Payment System (EFTPS) .