Wong expense account on service items

I've got the information you need, Dswain1. Let me help you update expense account changes to all historical transactions in your account. 

When managing accounts for your product and service items, updating account changes to Non-inventory and Service type items is applicable to allow updates on your historical transactions. You'll need to review your service items and manually apply updates in historical transactions. To do this:

1. In your QuickBooks Online account, go to Sales and select Product and Services.
2. Select the service item you want to change the expense account into. 
3. Once your expense account is changed, enable the Also update this account in the historical transactions checkbox.
4. Review the information again. Then, click Save and close.

However, if you change the income account for inventory items in the future, it only affects new transactions. Inventory-type items don't have this option because inventory items track quantities on hand using First In, First Out (FIFO). FIFO affects your assets and Cost of Sale (COS) differently from service and non-inventory items. Thus, if you want to update past transactions from this, you may refer to this guide for more detailed insights: Change the account for a product or service item in QuickBooks Online.

In addition, I've added this article to help you review financial data and sales inventory status on your account: Use reports to see your sales and inventory status.

We're always ready to back you up if you have additional questions when managing expense accounts. Just keep us posted in the comments below. Have a good one!