1. Select your business drop-down in the top right

2. Select "Settings"

3. Click "Products"

4. Select your required partner from the drop down under "Select partner"

5. Then select "Add new product"

6. Fill out all all relevant fields for your product

7. Press [[cmd]] + [[v]]

8. Select the tax rate using the drop down

9. Once fully completed, select "Add new product"

10. You will now see your new added product under your selected partner.
If you wish to remove a product, simply click the red cross at the end of the row