Submissions to the platform cannot be edited. However, if you have submitted a link to your GitHub repository, you may continue to edit the contents of the repository until the Bounty deadline. Any submissions with changes made after the deadline will be disqualified.
Related topics:
What is Bounty?
How are StackUp Bounties different from Quests?
Do I receive EXP for a Bounty submission?
Can I make more than one submission for the same Bounty?
Is it necessary to complete a prerequisite quest before joining a bounty?