Can I edit my opportunity once it’s published?
Yes, you can edit most fields throughout the life-cycle of the opportunity.
The only exception to this is categories, as these are locked as soon as you add a judge to your opportunity.
Since we add you as a judge as soon as you create it, so chances are the categories will be locked as soon as you’ve created the call. You will need to delete all judges before you can add more categories. Categories are then permanently locked as soon as you get submissions.
You can go here to see which elements you cannot edit once an opportunity is published.