Custom fields are supported in QBO Essentials and Plus on the following QuickBooks Online transaction types:
- Sales Receipts
- Refund Receipts (not supported currently within the Transaction Pro Importer App)
- Credit Memos
You first need to turn on custom fields in QuickBooks Online by going to Gear/Company Settings/Sales. More details can be found on the QuickBooks Online knowledge base
. Below is a screen shot from Quickbooks Online Sales Preferences for your review. You need to make sure that at a minimum that you check the boxes under internal.
After turning the custom fields on they will appear at the bottom of the Transaction Pro Importer mapping screen (see screen shot below).