There's a couple reasons why you would not see the "Submit Score" option:
Here are the system rules:
The "Submit Score" option only appears when a workout is active and has not passed the deadline.
If you're on a Team, only the Team captain (the person that registered) will see the "Submit Score" option
If the above are true and you still don't see the submit option:
Make sure you're signed in with the same email account you used to register, check your original registration confirmation email.
You may have signed up unknowingly with a typo in your email address. In that case contact us using the chat option and we'll get you squared away.
To expedite the process, let us know your First / Last Name, Correct Email Address and Event Name, this will help us locate your rogue registration.