For profit seeking entities in Taiwan must report all business income from both onshore and offshore of Taiwan (worldwide basis).
The corporate tax rate is 20%. The corporation is required to report its profit for profit-making business for the previous year by filing a statement of settlement from May 1 to May 31 every year. If your fiscal year is not from January 1 to December 31, you should report your corporate tax within five months after the end of that fiscal year.
In case of an income sourced from outside of Taiwan, the income tax paid under the applicable country’s tax laws may be deducted from the total corporate tax payment amount, but not from any tax that exceeds the tax amount calculated at Taiwan’s applicable tax rate.