I noticed recently that if you create a new company in Microsoft Dynamics GP and then use the Company Copy function of the PSTL (Professional Services Tools Library) you will receive an error when trying to post transactions from the Payables Management module:
The following errors were found while attempting to post
Tax detail information is incorrect.
The issue is that while PSTL will copy the tax schedules and details across, it doesn’t actually copy all of the related information across in the background. The fix is quite simple; each tax detail needs to be loaded and saved in the Tax Detail Maintenance window ().