Sometimes, manufacturers discontinue older ISM Office versions. If the verified download is no longer on the official site:
Never, ever download from:
Do not trust third-party hosting sites (like Softpedia, Brothersoft, or random Google Drive links). The only verified source is the official Government of India portal. ism office 304 verified download
The software in question is a Java-based desktop application provided by the Directorate of Income Tax (Systems). It allows taxpayers to prepare grievance submissions offline and then upload them to the central government portal. Never, ever download from: Do not trust third-party
Why the "ISM" confusion?