Tax Group field required for taxable line items

The Tax Group field in Sales Order Entry-Advanced Line Entry Extend window is now required when you enter an order line for a taxable customer or product.

Previously, it was possible to delete the default value in this field and leave it blank on a taxable line. Now, the error Invalid Tax Group (4217) is displayed. If the intention is to create the line as nontaxable, the appropriate Tax Group must be selected.