In India, according to the Payment of Gratuity Act, 1972, gratuity is calculated based on the last drawn salary and the number of years of continuous service. Even if your company has not provided a detailed breakup of your salary, you are entitled to claim gratuity based on your total salary amount. The professional tax deduction does not impact the calculation of gratuity. To claim your gratuity, you should ensure that you have completed a minimum of 5 years of continuous service with the company. It's advisable to reach out to the HR department or the labor office for assistance in calculating and claiming your gratuity amount accurately.