Tax report history is stored within the PY folder of your Files Folder for all tax forms: How to access the secure files folder: (https://files.blackbaud.com/(SiteID)/PY/Histories)

If you do not have a PY folder or there are no history files within your PY folder, please contact Blackbaud Product Support.

If you have migrated from on-premise to Blackbaud Hosting Services, the Tax report history files can be uploaded into the Hosted Files Folder.
  1. Copy the Histories folder from your local workstation. This is typically located in the following directory: C:\Users\[Username]\AppData\Local\Aatrix Software\Aatrix Forms\Blackbaud\[Tax ID]\Histories
  2. Upload this folder to https://files.blackbaud.com/[SiteID]/PY/Histories