Error 4555 can anyone help with this issue?

As per the CRA:Error 4555 code: Line 55400 for the number of months your client was in receipt of CPP or QPP retirement benefits and/or line 55550 for the number of months for disability benefits cannot exceed "12."

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I have put 12 but still say error CRA refuse .... What do i do?

Please verify your T4A (P) slip that you did not enter 12 on both retirement and disability. It will be entered on either or. 

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