<h1>New E-Filing Features for AY 2009-10: Enhanced Security, Digital Certificate Registration, and Improved Error Handling.</h1> The e-filing process for Income-tax Returns for AY 2009-10 has introduced several changes to enhance user experience and security. New users can register their digital certificates during registration, which now includes a Captcha for verification and a secret question for added security. Users must activate their accounts via an emailed URL within 10 days. Existing users can update their secret questions and digital certificates. The platform provides a password strength indicator and displays XML file upload errors, offering a downloadable CSV for multiple errors. Post-upload, users can download ITR acknowledgments, and various utilities are available for download.