The Financial Administration disclosed a planned outage of the Central Information System (CIS) scheduled for 30 June 2026, from 21:00 to 24:00. The outage is necessary to implement updates aimed at enhancing system stability, security, and performance. During this period, all functions dependent on CIS will be inaccessible, including data exchange for customs declarations and electronic tax reporting. Operators are advised to complete any pending transactions before the outage window and to schedule critical processes outside the affected timeframe. The notice also provides a contingency plan, recommending the use of alternative communication channels for urgent matters and ensuring that technical support teams will be on standby to address any issues that may arise. The administration stresses that the maintenance is part of a broader initiative to modernize tax infrastructure and align with European best practices. No service interruptions are expected beyond the specified period, and full functionality will be restored once the updates are completed successfully.