U.S. passport holders will be allowed to enter Taiwan without a visa for up to ninety days (no extensions allowed) if they have a passport valid for at least six months from the date of entry into Taiwan and have a confirmed return or onward air ticket.  Universal Passports & Visas always recommend checking with your airline as requirements may change without notice.  Taiwan requires that citizens of most countries obtain a visa to enter.  The Consulate General of Taiwan will determine the duration of stay upon receiving an application.
Business: The Taiwanese business visa is designed to allow business travelers to come to Taiwan to pursue business activities, such as attending meetings and conferences.  However, it excludes holders from seeking employment in Taiwan.
Tourist:  The tourist visa (also known as the ‘visitor visa’ or ‘visit visa’) allows the holder entry to Taiwan but strictly forbids them from engaging in any work while in Taiwan.  Taiwan tourist visa holders can also not extend their stay beyond the visa limits.