3824291 - How do I set the system to automatically combine Hotel room rate and Tax?

I am the system administrator. I know that Expense type ''Hotel Tax'' is a system expense type that could not be disabled. How do I set the system to automatically combine Hotel room rate and Tax even our employee input tax amount into the Hotel itemization wizard? So that system will not create Hotel tax expense?

Prevent Hotel Tax from appearing as a separate line item by excluding it from hotel itemization. , KBA , CON-CA-ADM-PAS , Policy Assistance , Problem