We advise taxpayers to keep their records and documents for 7 years.
Note that you should scan your documents where there is a chance the printing may fade, such as cash register receipts. You are responsible for keeping and maintaining your records if CRA wishes to review your documents and receipts.
Please note that even if we are doing your bookkeeping, we do not keep copies of credit card and cash receipts. Retention of these documents, and all tax documents, is the taxpayer’s responsibility.