As RRSP Contribution receipts do not have to be issued until May 1st (which does not seem right as other slips have a Feb 28 or Mar 31 deadline), you may or may not find these tax slips online in your CRA My Account.
If you have the physical slips, you should manually input them. If you haven't actually received those slips, but they are online with CRA, import what you have not received. Just be sure you don''t accidently claim the same slip twice.
