Hi,
In the account payable journal we have the feature "Use sales tax direction from main account" to control the sales tax direction of the sales tax transaction.

The same feature is legally required on a free text invoice journal. The use case is that companies use the free text invoice journal to cover cost incurred on behalf of a another (group) company. For example one company (legal entity) expense a telephone cost, and is then invoicing a sister company for part of the cost. The free text invoice is crediting the cost account, and since it is a reduction of cost the sales tax must also be reduced. And since the sales tax reporting is accumulating sales tax by the sales tax direction the report will today state both a receivable and a payable, but must only state a payable.