Currency in Taiwan is NT$ :
There are several paper money types : NT$2000, NT$1000, NT$500, NT$200 and NT$100.
There are several coin types : NT$50, NT$20, NT$10, NT$5 and NT$1.
Currency exchange can be done in designated banks or international tourism hotels. Travelers should keep the receipt. If traverls would like to exchange the remian Taiwanese dollars, the receipt is required to demonstrate.
* For more currency information, please go on the website of Central Bank of Taiwan.
Reference material :
Central Bank of Taiwan
Money exchange institutions in Taichung
Exchange rates :