Each shift, you have to complete several tasks before leaving for the day. it is near the end of your shift and you probably will not have enough time to finish all of your assigned work before leaving. the best thing you can do is:
I believe that the best thing you can do is explain the situation to your supervisor and ask for help. Maybe the tasks were too demanding for one person to complete that particular day, which is why you couldn't do it. If you have valid reasons as to why you failed to do your job, I don't think the supervisor will be mad about it, but will rather give you a hand or have someone else help you.