80DD EXEMPTION

What type of disability ? .

Locomotor disability with 90%

Locomotor disability is covered under section 80DD of the income tax Act, so you may get deduction , fixed amount of Rs 125000/- irrespective of the expenditure because disability is more than 80% , however you have submit all required documents and
disability certificate issued by medical board of Government. contract nearby CA he will guide you.

If  expenses are less then 125000/- then , whichever  is less  may be applicable  just  confirm . 

Submit form 10-1A . to your Employer..