Hi there, you can enter your code when paying for ...
KBW
Level 2

Troubleshooting

Hi there, you can enter your code when paying for your return. When you get to the Order Summary screen, there's a box in which you can enter the code. 

Take a look at the article below. It describes the steps and shows screen shots. 

https://turbotax.community.intuit.ca/questions/1190167-in-the-online-edition-of-turbotax-how-do-i-us...

I hope this helps!