Can anyone help. If l quote a customer before the new vat change, what happens when i have to invoice stage payments and they roll over to the new vat year help?
Each stage of payment is taken seperately, as if a different transaction, so when the VAT increases your next stage payment should include VAT at the new rate.
If you are quoting to a trade customer, then you could quote you price plus VAT at the rate in force.
Tricky if its a retail customer but thats how it goes.