Users with Edit Catalog Items permission can edit the private line tax allocations.
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When editing, you can update or remove existing allocations, or add new allocations. The total allocations must add up to 100%; otherwise, you will not be allowed to save the changes.
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When editing or adding a new allocation, a dialog opens to let you search for a tax jurisdiction. You can search for a jurisdiction by address, state/county/city, or country. The top portion of the dialog lets you perform searches and select the appropriate tax jurisdiction. The allocation and exemptions can be set in the lower section of the dialog.
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Clicking OK brings you back to the edit page. You need to click SAVE for the changes to the private line tax allocations to be saved.