To resolve this error in Access Tax, log in as administrator into Integration Server, and then follow the below steps:
Note: The Integration Server administrator is required to be a staff user in Access Tax, see add a new user for instructions.
Reauthorise in Integration Server
Log in to Integration Server as the system administrator user.
Click on the Product Setup on the left.
On the Access Tax row, click on the cog wheel icon.
If Reauthorisation Required is displayed, click Add then Allow to reauthorise.
Reauthorise in Access Tax
The system administrator on the Integration Server will log in to Access Tax.
Go to the Practice Settings icon, Integration, then click Authorise.