Prompt after swiping one’s card at an iPad cash register NYT crossword clue

After swiping a card at an iPad-based cash register, one common prompt that follows is “ADD A TIP.” This is typically the stage in the transaction where the customer is given the option to leave a gratuity for the service. Many modern point-of-sale systems, especially those on iPads, automatically ask for the tip amount after processing the payment, offering suggested amounts based on the total bill.

The clue refers to this action, where the system prompts the customer to decide whether to include a tip for the service received. The correct answer to this clue is ADDATIP.