You can get T2 web access code from this link:
You need to contact CRA Corporation Internet Filing Helpdesk to get corporate web access code.
|Corporations resident in Canada||1-800-959-2803|
We accept collect calls.
Alternatively, you may request Web Access Codes by fax. You must provide the corporation name, Business Number and Tax Year End. Send the request to the attention of the 'Corporation Internet Filing Help Desk' in Shawinigan at 819-536-4486 or Winnipeg at 204-984-0418.
For detail, please refer this link