I recently did some freelance writing for a local authority and haver received a purchase order in the post for the work I did. I take it I am supposed to quote the PO no. on my invoice, yes? However what is confusing me is that there are two amounts of money on it - a gross amount and a net amount. The gross amount is larger as it includes VAT. Which amount do I quote on my invoice - how does the VAT thing work??
Sorry, clueless, never done this before 