Hello there, Doubts reg Qu.
I appreciate you dropping by regarding your mapping concern with the custom fields. I can help you get the assistance you need to map the values successfully from Salesforce CRM.
We have a separate forum called Intuit Developers, where you can find engineers who can share suggestions for API concerns. I can refer you to this department to help you further with app integrations. Check out this link: Intuit Developers Community.
Here you can get assistance with third-party app integrations, participate in software developments and innovate business tools for QuickBooks.
Aside from integrating third-party apps, did you know you can transfer app ownership or disconnect an app in QuickBooks Online? I have a link here you can visit to learn more about the process: Transfer app ownership or disconnect apps.
Keep in touch for any concerns you may have with syncing apps or using QuickBooks Online. We'll be here to help. The Community doors are always open for you. Have a nice day.