IRS Publication 502, Medical and Dental Expenses, page 8 - https://www.irs.gov/pub/irs-pdf/p502.pdf#page=8
Guide Dog or Other Service Animal
You can include in medical expenses the costs of buying, training, and maintaining a guide dog or other service animal to assist a visually impaired or hearing disabled person, or a person with other physical disabilities. In general, this includes any costs, such as food, grooming, and veterinary care, incurred in maintaining the health and vitality of the service animal so that it may perform its duties.
To enter your medical expenses -
Click on Federal Taxes (Personal using Home and Business)
Click on Deductions and Credits
Click on I'll choose what I work on (if shown)
Scroll down to Medical
On Medical Expenses, click the start or update button
Or enter medical expenses in the Search box located in the upper right of the program screen. Click on Jump to medical expenses
