If you use OneWorld, the SuiteCommerce InStore (SCIS) item records and employee records must be assigned to the same subsidiary. When you are configuring records in NetSuite, it is important to set the Subsidiary field on each record. You must also set up nexuses for each subsidiary you use with SCIS.
For example, you have subsidiaries in New York and California and you plan to use SCIS with the subsidiary only in California. You must select the California subsidiary on item records and employee records.
To calculate tax correctly, a nexus must be set up for each subsidiary location.
Go to Setup > Company > Subsidiaries. Click the Nexuses subtab. Verify that you have set up a nexus for each location. See the help topic Subsidiary Setup for more information.