Hello Kumar, I can answer your question.
Here is the guide for Go Daddy connected a domain - https://www.bookmark.com/help_center/topics/redirecting-your-domain-from-godaddy
My first question is have you upgraded your account to Pro or Business? This is required for you to connect an external domain.
If you have upgraded and are having trouble with the guide you can always just ask Go Daddy support for help in doing so.
Here is a handy email you can copy and paste to send to support.
I would like your assistance with a change to my domain details with your service.
I would like to point my domain to a website I’ve made at Bookmark.com (a website-builder service). This means I need to change my A-Records to point to Bookmark’s IP address for both “www” and my root domain.
Could you please change the A-records for:
www.mydomainname.com to point to 22.214.171.124 and
mydomainname.com to point to 126.96.36.199
This is not a request to transfer; I want to keep you as my domain registrar.
Thank you so much!