See this article if you aren't familiar with creating an amended return in TaxSlayer ProWeb.
Once you have completed an Amended Return in ProWeb and are ready to transmit it, navigate to the E-File page. The Federal Return Type needs to be a type other than "Paper Return". (Note: if the original return was paper filed, the amended return will also need to be paper filed. It will reject if e-filed.) If the amended return bottom line is a balance due and the taxpayer wishes it to be paid by direct debit, select the return type "E-file: Direct Debit", then select the menu Taxpayer Bank Account Information and add or verify the bank info.
Next, select the menu Amended Return Information:
You will be asked about e-filing the amended return:
Select Yes, then select Save at the bottom of the page to continue to the Submission page.
At the bottom of the Submission page, you will see a new button Save and Transmit Amended Return:
Select this option to transmit the amended return.