To get any General Queries from Income tax Department Government of India, you can dial the Toll Free Number 18001801961 Aaykar Sampark Kendra (ASK) for any queries you have.
For e-Filing of Income Tax Return Dial 180042500025 or +918026500025 / 08026500025
e-Filing Login and Working Hours of Call centre are 09 AM to 08 PM – Monday to Saturday.
For more info visit www.tin-nsdl.com
For more information on Customer Help service visit this site http://www.incometaxindia.gov.in/Pages/Tax-helpline.aspx