I've just downloaded a the French version of TurboTax 2023 (Turbo Impot De Luxe 2023) and there seems to be a glitch at Line 18 of Annex 15.  This field should allow for a manual entry to specify the amount of the deduction being requested for 2023 if less than the contribution amount, as allowed by the Tax Code.

I've attempted to modify the field and get a pop-up referring me to Help about manual entries, while this field should be editable to defer an amount to a subsequent taxation year, in  the same way as is possible to do this for RRSP contributions through Schedule 7.