Café - Drinks and perhaps snacks. Pay the bill in cash or by bank card. VAT will already be included. Leave a few euros, about 10% of the total.
Grocery Store of Deli - VAT will be included. Food is taxed at a different rate than wine. No tip.
Hair Dresser - VAT will be included as service. Pay in cash or bank card. Round up the bill and give your server at least 10% in cash.
Taxi - Drivers prefer cash but you can pay by bank card. Give a tip of about 10%.
Tip in cash
Ask the driver to add a couple or three euros to the credit card total
before he rings up the total.
By understanding the difference between VAT and tipping, and following local customs, you can ensure that you show appreciation for good service appropriately.