This instruction does help?
https://www.immigration.gov.tw/5475/5478/141465/141808/141948/
Notices for the Submission of National without Registered Household in Taiwan Area for Application of Residence in Taiwan Area – under age 20
This instruction does help?
https://www.immigration.gov.tw/5475/5478/141465/141808/141948/
Notices for the Submission of National without Registered Household in Taiwan Area for Application of Residence in Taiwan Area – under age 20