How to "cancel" Taiwan passport

Hello,

How do you cancel your current Taiwan passport if you received your US passport (via naturalization)?

Thanks for your help.

Are you perhaps under the impression that you have to do so? Because it isn’t necessary. Having more than one passport can be tremendously useful; and trying to regain lost citizenship can be difficult, time consuming, and expensive. So you should be absolutely sure you know what you’re doing before unnecessarily dumping a TW passport.

But if for whatever reason this is something you really want to do, contact the Bureau of Consular Affairs.
boca.gov.tw

Edited the above to add info.