Once You have Registered in Person at the DCI on Saturday Morning (Registration Opens at 8:30AM)
Here is how to submit your decklist via Ravensburger Play Hub (RPH):
Access the Event: Go to "My Events" or find the event screen where your tournament is listed.
Open Deck Submission: Click on your specific event. Look for the deck submission area, which typically appears as an option or button just above the pairings display.
Input Your Deck: You can either type in your list or paste text, or link a deck you've previously built in the RPH. Using a 3rd party service like dreamborn.com may make exporting your list to text easier
Finalize and Submit: Review your list for accuracy and press "Submit" before the Player Meeting at 9:30AM.
Note: With recent RPH updates, players can now create, save, and export decks directly within the hub.