Switzerland is known for its unique taxation system, which is characterized by cantonal autonomy and federal coordination. The federal government is responsible for the overall tax framework, while cantons and municipalities have a significant degree of autonomy in setting tax rates and policies.

Corporate taxation in Switzerland is applied at both the federal and cantonal levels. The federal corporate tax rate is 8.5%, while cantonal tax rates can vary from 6% to 24%. There are also additional taxes, such as stamp duties and withholding taxes on dividends and interest, that may apply. Companies are required to file annual tax returns and make payments to the tax authorities by the deadline set by the government.

Personal taxation in Switzerland is applied at both the federal and cantonal levels, and taxes are assessed based on the taxpayer's income, wealth, and residence status. Tax rates can vary significantly between cantons and municipalities, and can range from 1% to 35%. In addition, there are taxes on capital gains, gifts, and inheritance. Individuals are required to file annual tax returns and make payments to the tax authorities by the deadline set by the government.

Value Added Tax (VAT) is applied to most goods and services in Switzerland at a standard rate of 7.7%, with reduced rates of 2.5% and 3.7% for certain goods and services. Businesses registered for VAT must file quarterly or annual VAT returns and make payments to the tax authorities by the deadline set by the government.

The tax calendar in Switzerland varies depending on the canton and the type of tax. Generally, tax returns and payments are due by the end of March or April of the year following the tax year. However, some cantons may have different deadlines, and businesses may be required to make advance payments throughout the year.

It's important to note that tax laws and regulations in Switzerland can be complex, and it may be necessary to consult with a tax professional or legal expert to ensure compliance with Swiss tax laws. Additionally, tax rates and regulations can vary depending on the location and industry, and it's important to check the local tax laws and regulations to ensure compliance.