Maintain Tax Code status when posting Furniture Labor Cost

We use the Furniture module > Post Hours & Approve Cost to post labor costs. We have a Tax Code assigned to the Labor item in Item Inventory so taxes are not calculated on the order for MO tax districts only. This works great when manually adding the item to Order Entry. However, the Tax Code setup is ignored when the labor costs are posted from Approve Cost to Order Entry. Currently, it always posts as non-taxable and we have to manually recalculate taxes on orders in taxable districts. This leaves too much room for error and has caused us tax issues in the state where we are supposed to charge taxes.