Note: If you cannot find the subtitle on the main sites, check the comment sections of those sites; often users upload corrected versions (v2.0) if the original release had sync issues.
Since official DVDs released in India rarely contain Sinhala language tracks, the best method for a portable experience is the "Soft Subtitle" method. This allows you to keep the original Hindi audio while displaying Sinhala text. taare zameen par sinhala subtitles portable
Taare Zameen Par Sinhala Subtitles: A Guide for Portable Viewing Taare Zameen Par: A Heartwarming Tale of a