I purchased turbo tax but how do I apply it to my return fee?

I too prepurchased Turbo Tax, but I do not see a prepayment code anywhere.  Where can I find this code?

Thank you for your question.

Your payment code can be entered on the payment screen when you have completed your return.

For more information, kindly follow this link: https://turbotax.community.intuit.ca/questions/1190167-how-do-i-use-a-prepayment-code