If a client pays via paypal the payment is downloaded from my business bank account but I have paid for an expense via paypal so the amount is reduced how do I do that?

Thanks for that Kerry.

So what you would do is the payment for the invoice would go to undeposited funds, then a deposit would be created for the payment, and you would use the add funds to this deposit section to put in the PayPal fees expense account and the amount of the fees would be a minus value in the amount.