.......the VAT element is unknow until the final account is raised?
We would pay the required deposit amount on the pro forma for say 'hotel & restaurant group booking' but the whole bill may not all be subject to VAT. How would I record the payment amount on a cash accounting scheme in this instance when the VAT element is unkown? I use Sage.
I would think you account for it when payment made, calculate VAT from pro forma (if you don't know you will have to estimate) enter to accounts, and when you get VAT invoice make adjustments if needed.