The procedure is like the one on the smartphone:
Start any browser that you can access on your computer and look up nfl.com.
This is the official site of NFL will be open. In the left-hand side on the Options bar, you’ll be able to see a “Sign in” option. Click it to open it.
You will be directed to the sign-in screen of your NFL account.
If you’d like to open your own account then scroll down through the page until at the bottom, you’ll be able to sign up with an option in the section “Don’t have an account?” Click it.
Article source: https://www.nflcomactivate.com/