Where did you get that link?
What is the name of the affiliate offering the discount that you are interested in? Often it's a bank, credit union, insurance company, travel club, etc.
If an offer is "up to $20" off, that usually means:
$10 off Deluxe ($59 reduced to $49)
$15 off Premier
$20 off Self-Employed
One normally goes first to the affiliate partner's website (without going to regular TurboTax website). At the partner's website there should be an offer page with a special link to TurboTax products. You have to use that link on the partner site, and then you should see a page with the discounted products. On the page that shows all the products and pricing, the normal price will have a line drawn through it, and there will be the lower price adjacent to it. You have to select the product there and start a TurboTax return there on that special site, and go there to work on and finally file from that special affiliate TurboTax website. That's how TurboTax knows to apply the discount.
If you've already been using TurboTax or been to the TurboTax website before going to the affiliate partner's website, you would need to empty browser cache, deleted any TurboTax cookies, etc., or it will remember that you were using regular TurboTax. Only by starting fresh at the affiliate site does it know to apply the discount, and then going there to work on it and file from the affiliate site.
FAQ: How do I get my TurboTax affiliate partner discount?
https://ttlc.intuit.com/community/charges-and-fees/help/how-do-i-get-my-turbotax-affiliate-partner-d...
