There is no official end-of-year tiebreaker built into the Pick 'Em pool settings.
Many pool commissioners choose to set a custom rule, such as using the cumulative weekly tiebreakers to decide a winner.
You can do this by:
Going to Reports → Pool Week By Week
Hover over the YTD column and header to see each member’s cumulative tiebreaker values
Compare the totals of tied participants and rank them accordingly
Afterward, you can post the final results on your pool’s message board or share them directly with members.
If you’d like help setting this up, feel free to contact support@runyourpool.com!