Abstract
Micro and small companies play a key role in fostering development and contributing to Brazil's economic advancement, but the lack of planning and high tax burdens cause the early mortality of most of them in the country. Given this high tax burden, there is a need to undertake strategic and planned actions that allow companies to increasingly minimize costs and expenses, thus maximizing profits and economic growth, always complying with the laws of the tax system, reducing the tax burden of the organization. The study in question was developed based on bibliographic research of diverse authors taken from books, articles, scientific journals, among others. The results showed that tax planning is also called tax avoidance, which is an accounting tool that helps reduce the tax burden of companies through lawful acts. The results also revealed that the use of tax avoidance practices can contribute positively to the tax planning of micro and small companies, because the tax avoidance allows the entrepreneur to properly adjust his company, also helping in the economy of tax payment through strategies, and lawful techniques. It is concluded that tax planning or tax avoidance is a tool that generates relevant information that influences the decision making of the entrepreneur, allowing a better choice about tax payment options in order to have tax savings for his company, enabling higher chances of growth in the market.