Just done some research on your question and found something relevant to you! When I reached the deals page of Yahoo with Yahoo account login, I didn't find direct link to post coupon to yahoo deals but up on navigating various links I understand that we will need to sign up for a PriceGrabber account in order to include our products in Yahoo Shopping. And as I see the products listed in yahoo store/shopping are offering the details in coupons, getting your products in yahoo shopping will allow you to create coupons! For more information visit yahoo's deals page-> click on Help link at the top left corner of the page -> when you reach the help page of yahoo shopping under 'Yahoo! Shopping Help Topics' ->Yahoo! Shopping Merchant Help-> and under 'Yahoo! Shopping / PriceGrabber Merchant Help' ->'How do I include my products in Yahoo! Shopping?' Confused? Simply Google for 'How do I include my products in Yahoo! Shopping' and you will get the direct link. All the Best!