I've got you covered, sylvia35.

Thank you for the screenshot. Let me clear things out so you can see the option when editing the product and service.

You'll first need to change the income account of the item. Then, the Also update this account in historical transactions box will appear. See the attached screenshots below for your visual guide.

You can visit again this link for additional information: How do I change the account my product and service item is associated with?

In case there isn't enough quantity on hand for your products and services, you can set up reorder points. Check out this article for instructions and detailed steps: Get alerts for low or out of stock products

Stay in touch with me if there's anything else you need with updating your products and services. I'll be right here to help you.