you already got your answer? anyway, i recently got the same error ang called the helpdesk. they informed me that the error message means that cra needs to verify my personal informations. to do so, cra expects to file income tax, as i am a newcommer i don't have this, hence this can never be done for now.
as for the cctb, i guess i would need to reread quorax post and follow it.
as for the cctb, i guess i would need to reread quorax post and follow it.