[dsfyu404ed]

Why would you want it to include sales tax. If the government is taking a cut of a transaction the people should be well aware of it.

[tbarker25]

It's somewhat anti-consumer for the price listed to be different to what you end up paying.

A receipt in Australia for example will display total:$10 including $0.90 sales tax. it is illegal to display a price that doesn't include it.

[DanBC]

You can include the VAT on the receipt that the customer gets after paying. Most food in UK is zero-rated for VAT.