You must file the PT returns on/before the 20th of the next month; i.e., November returns must be filed on/before the 20th of December. You must file the returns to "The D.C.T.O" of your circle. You must know to which circle your office belongs.
Please find the attached PT Challan. Change the details (company name, registration number, etc.) in the Challan so that you can use it.