If your offence was minor in nature and you only have one offence on your record, you may be considered deemed rehabilitated. You must wait 10 years from the date of the completion of your sentence to be deemed rehabilitated. Nothing but the passage of time will qualify you for deemed rehabilitation and once this happens you should be able to enter Canada without having to make an application.
If your offence was a major offence, or if you have more than one offence, you will never be deemed rehabilitated and an application will be necessary to overcome your inadmissibility.
If you think you should be deemed rehabilitated but have been denied entry to Canada we may be able to assist you. Contact us today to speak with a licensed Canadian Immigration Attorney (716) 970-4007