АУСН ФНС России is an Android app designed to help small businesses and individual entrepreneurs with up to 5 employees and an annual income of up to 60 million rubles to use the new Simplified Taxation System that was introduced onin Moscow, Moscow and Kaluga regions, and the Republic of Tatarstan. This new taxation system is designed to simplify the tax reporting process and reduce the tax burden for small businesses. The app allows you to calculate and pay taxes, and provides information on the new taxation rules. The tax period is 1 month, and the tax rate is 8% for the "income" object and 20% for the "income reduced by expenses" object. The app also eliminates the need to submit a tax return and pay insurance contributions.