Hi RCV,

         thank you for sharing knowledge. I am sure this would help if I don't want to show custom field into Invocie or sales.

  I want to push data into custom fields using API. When I am trying to access custom fields using API, I am getting only 3 custom fields irrespective of their status(active or inactive). I want active custom fields, so that I can push values in those custom fields using API.

I found this article :https://blogs.intuit.com/blog/2019/04/08/enhanced-custom-fields-quickbooks-online-advanced/

which clearly mention that QB has limitation. 

I am not using all my inactive custom fields anywhere nor I have used them in past I created those only for testing purpose. now I want to delete them so that I can use new custom fields.

I am sure, I can't do it from UI or API. I wondering if QBO team  can do it from backend and clean all custom fields for me.

is it possible?