If my wifes disability amount is reduced by 94% as she earned most of her money on reserve this above the 6% should be put on line 242 how can I do that on this program?

My wife is disabled and gets a di pension from cpp because she earned most of her income on native land and she is a status indian the cra have amended her taxes back to 2008 and allow her only to claim 6% of her pension as taxable. They put the rest of the amount on line 242 allowable deduction for Status Indian