Does your husband read Chinese?
If what you did is this step,
特定國家配偶來臺申請依親簽證手續
https://www.boca.gov.tw/dl-1763-c5577d44615748648d774fff51ec5a85.html
The next step is here.
Resident Visas for Foreign Spouses of R.O.C.(Taiwan) Citizens Having Household Registration
https://www.boca.gov.tw/cp-166-280-9f808-2.html