I need to had a eco fee to a product in inventory

Hello mbeaudry-kynoxpa, 

It's important you're able to add an eco fee to your products in QuickBooks and I'll be glad to assist. The program offers a user-friendly platform that makes it easy for you to get your work done. 

In order to add a fee to a product, you'll first need to create a service fee item and here's how: 

1. Navigate to the Sales menu and click on the Products and services tab. Select New.

2. Click on Service.

3. Give the fee a name.

4. From the Category ▼ dropdown, select the category that best describes the fee.

5. You can learn more about item categories here.

6. Fill out the rest of the fields as needed.

7. When you're done, select Save and close.

From here, you'll need to add a fee to an invoice and here's an article that provides the rest of the steps including the step above as well. 

Give this a try and let me know how you make out. I'll be one message away in case you need additional support. Otherwise, I wish you a great rest of the week!