You had your 12th Commerce practical exam on 14th September, which means the final written exams will be scheduled a little later. Usually, theory exams are held 1–2 months after the practicals. For Maharashtra Board (HSC), supplementary or special exams are conducted in October–November, while the main annual board exams are held in February–March. You should check with your school/college notice board and the official board website for the exact timetable of your final exams.