Finance Minister Arun Jaitley will launch an updated version of the existing website of income tax department tomorrow to enable taxpayers to file easily their I-T returns or apply for a PAN card.This updated version of the existing website of the Income Tax department– www.incometaxindia.gov.in– will now be acting as a single window for all activities and online services offered by the I-T department. The website will be more user-friendly and robust, so that it can handle many hits at a time.The website will also allow taxpayers to know about the I-T Act, various notices and circulars being issued from time to time and regular developments in the department.