Get your taxes done using TurboTax

I got a coupon from turbotax.com telling me to go to turbotax.com giving me a 30% off discount code and then there was **bleep**ing nowhere to enter it.  I chose to pay my filing fees with my return, and at no point did the site ask me if I had any coupons.  I filed my taxes and now I'm not getting a **bleep**ing discount that the site itself sent me.  What the actual **bleep**?  I'm paying like $150 to file my taxes when it should be $100 because I have a 30% off code.  the site just keeps telling me about these **bleep**ing "service" codes. When was there ever a service code field?