While the TaxAct program does not support Form 7203 for 1040 returns, we do support the ability to attach the shareholder’s basis worksheet when required. In order to see this option during the e-filing steps, the "basis computation required" field must be checked on the Schedule K-1 (1120-S).
During the e-filing steps, you’ll be presented an option to "Attach Documents." Click the button and then follow the prompts to attach the pdf(s).