Report for taxable (VAT) fees

We're not registered for VAT and so don't charge VAT on our fees. However, we do mark fees as taxable or not taxable. I've been told there isn't a report that shows all the income we've received and marks whether it is taxable or not? We need to keep track of taxable fees in case they exceed £85k and we have to register for VAT. So a report with this additional information is vital.