We have a form to complete detailing her gross earnings each quarter, and they then send us an invoice. So how can we get it wrong when they'll invoice us???
That's why I don't really want to go to a tax advisor - as we'll eventually work out the correct tax from the invoices. But in the meantime I'd still like to know how much to deduct each month.
Or have I misunderstood (could be given I speak no German and the guys I've spoken to all had limited english)?