You can renew your Disabled Parking Card online. To renew it you have to go onto www.iwa.ie and click on renew parking permit. 
The parking permit will arrive in the post within a week of renewal.
You then can choose to create an online account or register online if you haven’t already done.
You can fill out a form online to renew your permit. You will then receive the permit in the post within a week. Make sure you send your old permit back.