What are the working hours of CPC? myITreturn Helpdesk Updated May 20, 2016 11:31 Follow Taxpayers can contact CPC from 8:00am to 8:00pm from Monday to Friday. Working hours of CPC, CPC office, Income tax Here we provided the working hour of CPC. Related articles "Assessee wants to know email id for CPC? " What is CPC help line number? Various e-filed Return / Refund status "Assessee is not able to call on toll free number from abroad? " Can I make rectification or other correspondence with CPC in paper form? Comments 0 comments Please sign in to leave a comment.