What is the definition of a small business entity in Taiwan? There are 4 criteria of a small business entity as below. The business scope is small. The monthly sales amount is lower than NTD$200,00. The monthly sales have been verified by the tax authority. Subject to tax registration if start to run the business. The VAT rate is 1% of the monthly sales. For example, if your monthly sales are NTD$80,000, you will be subject to NTD$800 per month and the payment should be made on a quarterly basis.