Description: Enter the total bill amount via the on-screen keypad, select the tax % from the list (or allow SplitBill to calculate it for you based on the $ amount) and assign the tip %. The Tip calculation may be made either before or after tax. SplitBill takes the guesswork out of splitting/calculating a bill among a group (or individual). Use the Tip Wizard to apply a logical approach to tipping.