Why the sync error occurs:
This error occurs when an item is marked as billable on a bill in Bill.com, but the box "I sell this product/service to my customers" isn't selected on the Item in Quickbooks Online.
How to fix the sync error:
In Bill.com, toggle the billable box off for the item on the bill
In Quickbooks Online, select the box for "I sell this product/service to my customers" and assign an income account to the item that's shown in the error.
- In Quickbooks Online, go to the Sales menu and select the Products and Services tab.
- Select Edit for the item.
- Select the I sell this product/service to my customers checkbox.
- Select the Income account dropdown and select the account you want to use to track the sale.
- Select Save and Close.