System maintenance
The CRA’s online services, including the ability to electronically file your taxes, are temporarily unavailable as a result of system maintenance. Please check this page for updates. Thank you for your patience.
Sure… I’ll believe that in a heart bleed… err, heart beat.
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http://www.cra-arc.gc.ca/representatives/
actual reason : CRA : Upon becoming aware of an internet vulnerability that affects some computer servers used by websites worldwide, we took down our online services, including electronic filing, and are taking steps to ensure that all information and systems remain safe