Warning message : The vendor you have selected is based in a nexus for which you are required to charge a different kind of tax.

Changing the vendor for a purchase transaction gives a warning message:

The vendor you have selected is based in a nexus for which you are required to charge a different kind of tax. Click OK to change the form to one that is applicable for that Nexus.

Scenario:
- User needs to change the vendor.
- The new vendor's subsidiary is the same subsidiary as the old vendor.

The reason for the warning message is because the default shipping address of the vendor, in particular the country information, is not a supported nexus of the subsidiary. Users can check the supported nexuses of the subsidiary by going to Setup > Company > Subsidiaries > View the Subsidiary > Nexuses tab.

In cases where the user cannot save the purchase order, the alternate solution is to set the default shipping address of the vendor to the country supported by the subsidiary or use the same country as the old vendor. Also, verify that the currency used by the new vendor is the same with the old vendor to avoid errors.