QuickBooks Online Sync Error: Items that are used on invoices cannot have sub-items; Categories cannot be used in transactions, or Invoice is using an item that has sub-items. Such items are called categories in QBO and are not allowed on invoices.
Why the Sync Error occurs
This error occurs when a bill or invoice with items on it in Bill.com is attempting to sync to QuickBooks Online (QBO), but one or more of the items on the bill/invoice is a Category type item in QBO.
How to Fix the Sync Error
- Edit the bill or invoice in Bill.com so that the items are not of the Category type
- Sync again