To amend the S-corporate return:
- Open ProSeries to the HomeBase.
- From the File menu, select Client File Maintenance, then Copy/Backup to backup up the original return.
- If you need assistance with this part, more information is available here.
- You'll need to use the original when preparing the amended return.
- Open the original return.
- On Form 1120S, p1-2, check box H(4) to indicate an amended return.
- Make the necessary changes to the return.
- If Schedule K-1(s) result in a change, go to the Schedule K-1(s) and check Amended K-1 (see Schedule K-1 information below).
- Attach a statement that identifies the line number of each amended item, the corrected amount, or treatment of the item, and an explanation of the reasons for each change. This statement should be mailed with the amended return.
- Save the return.
- If you'll be mailing the amended return, print and mail it to the service center where the original return was filed.
- If you'll be electronically filing the amended Form 1120S return, follow the instructions on the here.