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System upgrades




The Canada Revenue Agency (CRA) administers a comprehensive suite of processing systems, applications and databases that support its personal income tax (T1) program.  The T1 Systems Redesign project (T1SR) is a multi-year initiative to update and modernize technology components, while protecting the integrity of the tax base and ensuring benefit program delivery.



In June 2016, upgrades will be made to the database structure and electronic filing system, to ensure it can meet the future demands of electronic filing.



As a result of these system upgrades, error-free electronic returns that are successfully received via EFILE and NETFILE will be processed even more rapidly!



To ensure full implementation and integration of all components, CRA’s T1 Electronic filing system and other impacted services will be temporarily unavailable from June 21,2016, to June 26, 2016, inclusively



A comprehensive list of service interruptions and related dates is provided below:




EFILE and NETFILE web service


Date/time of shut-down (Eastern standard time)


Tuesday, June 21, 2016 at 3:00 a.m.


Date/time of start-up (Eastern standard time)


Monday, June 27, 2016 at 8:30 a.m.


Auto-fill my return and Client Data Enquiry


Date/time of shut-down (Eastern standard time)


Saturday, June 25, 2016 at 3:00 a.m.


Date/time of start-up (Eastern standard time)


Monday, June 27, 2016 at 6:00 a.m.

















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