Hi, I'm Sadique. Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP.
The warranty starts on the day you buy it. Your tablet has a 12 months warranty. From the serial number I got your unit's production date and how old it is since production. Your unit's production date is September 2015 and its 1 Year(s), 1 Month(s), 21 Day(s) old.As you purchased the unit in November, please go to the nearest Samsung Service centre without any delay to claim the warranty repair.
Is there anything else I can help you with?