proper service invoice Volvo dealer

Moin together, is it just me or have you already noticed that it seems to be difficult for Volvo partners to issue a correct invoice? Last year I took 3 months to get a half-acceptable invoice (15% / 19% problem). Currently I have an invoice on which no tax rate (but a tax amount) contains, which can make me problem with pre-tax deduction (for private individuals uninteresting). Best regards from the North! Lars