You don't mention if your QB 'Desktop' or QB Online, either of the links below should help:
https://www.quotewerks.com/helpfilelatest/customfieldssubtabquickbooks.htm
https://www.quotewerks.com/helpfilelatest/qbocustomfieldssubtab.htm
Hi Giusseppe,
QuickBooks Online doesn't have these fields as standard. As long as you are not using QBO Advanced, you can use one of the three Custom Fields available in QuickBooks Online for these values to go over to, and then you can map the fields from QuoteWerks
https://www.quotewerks.com/helpfilelatest/qwhelp.htm?qbocustomfieldssubtab.htm
Note: QuickBooks Online Advanced allows you to have more than three custom fields HOWEVER the QuickBooks Online API doesn't support these additional custom fields so the linking only works currently for QBO versions of Simple Start, Essentials, Plus
I am using QB online plus and I have created the fields in QB
Giuseppe Alleva