The book is aimed at beginners who want to learn the basics of accounting and tax accounting from scratch in the 1C: Accounting 8.3 program. Accounting, tax and other types of accounting, insurance and statistical reporting are described, it is shown how to submit reports via the Internet. The effective solution of typical tasks is considered: cash management, sales, production and services, payroll and mandatory insurance premiums, quarterly and annual reporting, tax calculation and much more. The third edition takes into account all changes in the program and in the current tax legislation for 2021, the current tax regimes are considered in detail.