I deposited money into rrsp account on Jan 25, '21 - did not claim in 2020 tax return (no room) - want to claim in 2021 return - how to do? Turbo tax doesn't allow

The Jan deposit was large and had forgotten I had same amount contribution in Sept 2020 and had forgotten that I made that contribution.  Can I take the Jan 2021 contribution and claim it in my 2021 tax return?