The amount in box 205 from a T4A is for One-time payment for older seniors.  As per Revenue Quebec- New code “RY” is used exclusively by the Government of Canada to identify the type of payment in the “Code (case O)” box and must not be entered in that box on the RL-1 slips that you file.

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There's no box 205 in TurboTax. Where do I enter the amount?