Hi there, Rebecca83.

Another way to enter this inventory item is to add a number at the end of the name. This way, the product/service name is different. It will also help you keep track of the SKUs properly.

Let me show you how:

1. Click Gear, and then Products and Services.
2. Click New.
3. Click Inventory. In the Name field, type "oil filter1", then "oil filter2", etc.
4. Enter the SKU and other information.
5. Click Save and close.

This article will also help you if you have additional questions with inventory: Inventory links and resources.

You're always welcome to post anytime if you have further concerns.