It depends on a few factors. Generally speaking, you should receive all your documents by the end of March.
If you made a contribution to an RRSP between March and December, you’ll likely receive your receipt by the end of January the following year. If you made a contribution between January and February, you’ll likely receive your receipt by end of March in the same year.
All other tax slips and receipts will be available between mid-January to end of March.