Hello, I got an email saying that I get 15% off. How do I apply this discount? It isn't showing up

You need to use the link in the email to receive the percentage off.

Thank you for choosing TurboTax.

Even if you use the email link, the discount may not be applied.  If this happens to you too next time, call their 800 number at four four six eight eight four eight before paying.  Putting this here so others can do so and learn from me not getting the discount refunded