Unfortunately, TSA locks cannot be reset without knowing the current combination or unless you are a TSA agent with a universal key. Otherwise, any person would be able to reset the lock and get into your belongings. If you've forgotten your TSA lock combination, there is a solution that will take 20-30 minutes if you don't get lucky. You will need to go through every combination until you unlock it. Start at 001, then 002, 003 and so on until it unlocks. If you can remember even just the first number of the combination, this process will take a lot less time.