How do I get to my next challenge after codepen?

Am done creating a pen but I don’t know where to submit it for next challenge. Please advise.

Once you click the “completed” button, you will be asked to copy and paste your codepen URL into the modal that pops up. That will be your submission.

I can’t find the completed button.
Is it in the codepen or FCC?

am stuck here

Go to the project’s page in fCC. This is for the tribute page:

Hit the big button at the bottom, then paste your codepen’s URL on the form that will appear.

Thank you very much am sorted