It means one claims the Disability Tax Credit amount and the other claims the left over unused part to transfer. The system at the Canada Revenue Agency will compare the file online to make sure the right person, who has been included in the original agreement, will be the one to get the transfer when applied for as seen in this Canada Revenue Agency link: Claiming the credit.
In order to help you with this situation, we believe your best option is to contact our telephone support team if you're in need of further assistance, as they have the option to view your screen to help and guide you. To contact them, please follow this link: Contact Us.
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