Extending an internship deadline can be done in a few ways. First, contact your supervisor or the organization offering the internship to discuss the possibility of extending the deadline. Explain why you need more time and make sure to provide any relevant information that may help them understand your situation better. If they agree, ask for written confirmation so that there is no confusion later on. Additionally, if possible, offer to work extra hours or take on additional tasks in order to compensate for the extended timeline. Finally, make sure you keep track of all deadlines and deliverables as agreed upon with your supervisor or organization so that you don’t miss out on any opportunities due to delays caused by yourself.