Modifying Starter Products: Remove installation and design services if they are not taxable in your area.
Because of the way Quickbooks handles taxes - if design and installation aren't taxable in your neck of the woods, you'll have to treat them as separate products.
Step 1. Remove them from your Starter Product - Pricing Templates
Removing Required Pricing Options
Removing Items to Be Charged
Step 2. Add them as separate Products
Create your non-taxable products as needed for services or items that don't require a sale tax rate. If you are unfamiliar with create products, you can refer to this article here. Create your First Product