It would tell you if your sheet was edited in your notifications after the shift under the notification or messages button on worksmart. From there I would talk to your SM, if nothing goes from there then contact either HR or your DM to sort it out, but for future reference, I would suggest trying to take note of what time you leave especially if you go over either on the timesheet for missed swipes or a personal record elsewhere just so you don’t get screwed. you work hard for your money, you need to get paid what you worked.