Currently, the work order inherits the Taxable (Y/N) value from the Work Order Type assigned. Often, whether the order should be taxable or not is actually a property of the type of account. Recommend adding the Taxable field to the Account entity and adding an option set field to the Work Order Type called "Taxable Source" with values 'Work Order Type', 'Billing Account', and 'Service Account' which drive the record from which it gets the Taxable Y/N value.
Category: Work order
Needs Votes
Ideas Administrator

Thank you for your feedback.

Currently, this is not in our roadmap; however, we are tracking it and, if we get more feedback and votes, we may consider it in the future.

Jason Cohen
PM, Dynamics 365 Field Service