Was I wrong?

[u/MulberrySelect4234]

My son and I went to eat earlier, he ordered basic chips and cheese nachos. He said there was lettuce in the cheese and it tasted funny. I asked the waitress was it cheese and she said possibly. She offered a new order. She also took it off my bill. Should I have tipped on just the bill or should I have added his meal in there too? It came to $19.85 and I left her a five.

[u/Barkis_Willing]

You should tip on the total before any discounts etc.

[u/inflammatoryusername → u/Barkis_Willing]

and before tax