I try to make a custom invoice and i didn't find a way to display a subtotal including the VAT. My problem is the column Total(VAT included) Here after what i'm trying to do :

description    Quantity  product-price(with VAT)   Discount(%)  Total(VAT included)

  Product A          2             120                   10              216.00

                                                                                                                                              ------------------------
                                                                                                                                 Total (with VAT)    :        216.00
                                                                                                                                 VAT (20%)           :         36.00
                                                                                                                                 Total (without VAT) :        180.00