On the Admin sidebar, go to Customers > Customer Groups.
2. Click Add New Customer Group.
Enter a unique Group Name less than 32 characters to identify the group.
Select the Tax Class that applies to the group.
3. When complete, click Save Customer Group.
On the Admin sidebar, go to Customers > Customer Groups.
Open the record in edit mode.
Make the necessary changes.
When complete, click Save Customer Group.
On the Admin sidebar, go to Customers > All Customers.
Find the customer in the list and select the checkbox in the first column.