In the UK, most (all? Not sure) receipts will have the amount of VAT indicated (e.g. my Amazon orders list "Total before VAT", "VAT", and "Grand Total"). Pretty

In the UK, most (all? Not sure) receipts will have the amount of VAT indicated (e.g. my Amazon orders list "Total before VAT", "VAT", and "Grand Total"). Pretty much everyone is aware of VAT AFAICT, and 20% of total gives you a reasonable estimate of what the VAT on an item is (bit of an over-estimate, and ignores items that have rates other than the default 20%, but generally good enough to get a reasonable idea).