That is a Canadian Tax Credit; this forum is US based. You can use the link below if you are in Canada.
TurboTax Community Canada I added below what I found from there..
The multigenerational home renovation tax credit (MHRTC) helps pay for changes made to a home so that an older or disabled person can live near a family member.
The maximum allowable credit is 15% of qualifying renovation costs, up to $50,000. Meaning, if you qualified for the full credit, you’d receive $7,500.
Find out if you’re eligible by completing the checklist at who can claim. Find out if your expenses are eligible by completing the checklist at expenses you can claim.