You can update your communication address in your PAN card by applying for a PAN card correction. You may file the application either online or offline. To apply for the correction through the online method, you need to visit the official website of the Income Tax Department and register yourself. Once you have registered, you can apply for a PAN card correction. For the offline method, you can download the PAN card correction form from the official website, fill it out, and submit it along with the required documents to the nearest NSDL or UTIITSL office.