March 2 is Deadlines for Contributing to an RSP for the 2019 tax year

The maximum RRSP contribution limit for 2019 is $26,500 or 18% of your income, whichever is less.
Any unused contribution room can be carried forward until you're 71.

Refer to your 2018 Notice of Assessment from CRA to determine your 2019 RRSP deduction limit.
Making required Home Buyers' Plan (HBP) and Lifelong Learning Plan (LLP) repayments to your RRSP for 2019

Use Schedule 7 of your 2019 income tax return to designate an RRSP contribution as a HBP or LLP repayment.

If you don't make the repayment, the unpaid amount must be claimed as taxable income on your 2019 income tax return.