RRSP Carry Forward to Future Years (this year and next year)

Hi, I contributed the RRSP over the limit before the 2020 Income Tax Filing last year. After I filled up 2020 RRSP deduction limit and I have Unused contributions available to carry forward to future years (this year and then next year). It shows up on Turbo Tax Online for 2021 return.

Which contribution period should I choose?

March 2 to Dec. 31, 2021 or January 1 to March 31, 2022?

Thanks.