Left Taiwan last year, how do I file and collect my taxes?

I am teaching in the mainland this year. Last year I passed the mandated 183 days, so, as I understand it, I am eligible to file for a refund. How do I do that? I lived and taught in Miaoli County. I live in Shenzhen now. Do I have to physically return to Taiwan to file? If so, I noticed that there is a tax office on Kinmen Island…can I go there? I still have my bank account and bank card active.

Pleh, Pleh! Cried Professor Backwards…