On June 1, 2021, the Ministry of Finance issued Circular 40/2021/TT-BTC guiding value added tax, personal income tax and tax administration of household businesses and individual businesses (Circular 40). Compared to Circular 92/2015/TT-BTC, Circular 40 has some changes in subject classification, tax calculation methods, determination of relevant organizations’ responsibilities, etc. Especially, Circular 40 has expanded the applicable subjects, typically individuals having income from digital information content products and services.