Item > Job > Area > JC Cost Type Defaults > Supplier Area > Supplier > Default Supplier Tax Group: This setting retrieves the Job and Area tax groups before the supplier tax groups. This setting is selected by default.
Item > Supplier Area > Supplier > Default Supplier Tax Group > Job > Area > JC Cost Type Defaults: This setting retrieves the supplier tax groups before the job and area tax groups.
From the Integration menu select Timberline Accounting > Accounting DB Settings.
Or, select the Accounting DB Settings 
icon from the toolbar.
Verify the database currently selected in the Accounting Databases field list is the correct database for which this setting will be defined. If necessary, click on a different database.
Click the Tax Settings tab.
Under Tax Group Retrieval Hierarchy, select the desired order in which taxes will be retrieved.
Click on Save.