I printed an Indoor Self-Park Coupon for 25%. Below the 25% it says "Plus 17.95% tax". When I requested a quote using my Promo Code for 6 days the quote was $74.03. Is the 17.95 % tax additional to the quoted amount?

I honestly don't remember. I am pretty sure (but not positive) that we were quoted a total, not subtotal plus tax. It should indicate on your quote if there are additional fees...

Yes it is

The quote must include taxes given the odd numbered total.