Hi Pablo123,
You can claim for your medical expenses either on
www.mygovi.ie or by completing the necessary form as mentioned above. The easier option is online.
Citizens Information explain how to claim here.
Apply online
If you are a PAYE (Pay As You Earn) taxpayer, you can
claim tax relief online using myAccount.
If are a self-assessed taxpayer, use
Revenue Online Service (ROS) and complete the health expenses section on your annual Income Tax Return (Form 11).
Receipts
You can only claim for medical expenses if you have receipts to prove your claim. For dental expenses, your dentist should complete
Form Med 2 (pdf) for you to use as a receipt.
Revenue's myAccount service includes a
receipts tracker service which allows you to store your receipt details online. If you use this service, you can claim tax relief under the Real Time Credit service. This means that you can claim for health expenses and nursing home expenses when you pay them and get increased tax credits in your next payroll payment from your employer. You can
make a Real Time Credit claim using myAccount.
If you don't use the receipt tracker, you must keep your medical receipts for 6 years because Revenue may ask to see them.
Apply offline
You can also claim medical expenses relief offline by completing a paper
Form 12 (pdf) and returning it to your Revenue office. If you are not able to use Revenue’s online services you can use
Form 12S (pdf) (a simplified version for routine tax returns). You can also request to have a Form 12 or Form 12S sent to you by calling Revenue on (01) 738 3675 or by emailing
custform@revenue.ie.