While you cannot find any coupon to renewal domain at GoDaddy, almost people will transfer it to other provider (Such as Namesilo) or accept to renewal with high price. Hosting Coupon Code has an idea to transfer every domain at GoDaddy with only $11.
This method uses the discount campaign of renewal domain in India. In Shopping Cart, you just change the currency from USD $ to INR RS; You will see the amount of money decrease to 709.98RS (Approximately $11).
I tested this with .COM/.NET/.ORG/.INFO and it work perfectly. The price of renew domain at GoDaddy is quite high and this is an interesting way to reduce cost in renew domain.
You can access GoDaddy Here