Tax administration automation via ACES enables online registration and electronic filing with system validation and status tracking. Implementation of the workflow-based ACES application to automate Central Excise and Service Tax processes, replacing legacy systems and enabling on-line assessee registration, electronic filing of statutory returns and related claims, document status tracking and business alerts. ACES supports distinct user categories (new, existing, non-assessee, LTU), prescribes registration and document submission procedures, offers online and offline return filing with ACES validation and status reporting, and is designed to accept digital signatures though that feature will be inactive initially.