The Internal Revenue Service (IRS) is the federal agency responsible for administering and enforcing the Internal Revenue Code, which governs taxation in the United States.

The primary purpose of taxation regulation is to ensure that the tax burden is distributed fairly and equitably among taxpayers, taking into account their ability to pay.

Progressive tax rates are a common type of tax regulation in which the tax rate increases as the taxable income increases, resulting in a higher tax burden for higher-income earners.

Tax deductions and credits are used to reduce the tax liability of certain taxpayers, either by directly subtracting an amount from their taxable income or by providing a tax credit that can be used to offset their tax liability.

A tax loophole is an unintentional provision in the tax code that allows taxpayers to reduce their tax liability in ways that were not intended by the lawmakers. A tax avoidance strategy, on the other hand, is an intentional action taken by taxpayers to reduce their tax liability within the legal framework of the tax code.

One of the common criticisms of the current tax system in the United States is that it is too easy for wealthy individuals and corporations to avoid paying taxes through various loopholes and tax avoidance strategies.

Tax incidence refers to the distribution of the tax burden among different groups of taxpayers, taking into account who ultimately bears the economic cost of the tax.

The Laffer Curve is a graphical representation of the relationship between tax rates and tax revenue, illustrating the concept that there is an optimal tax rate that maximizes government revenue.

Tax evasion involves intentionally failing to pay taxes that are legally due, and it can take various forms, including claiming false deductions or credits, failing to report all income, and using offshore accounts to hide assets.

Tax treaties between countries serve multiple purposes, including avoiding double taxation of income, promoting trade and investment between countries, and facilitating the exchange of tax information between tax authorities.

Tax incentives are used to encourage certain economic activities or behaviors, and they can take various forms, including tax credits, accelerated depreciation, and tax exemptions.

Tax equity refers to the principle that everyone should pay taxes according to their ability to pay, ensuring that the tax burden is distributed fairly among taxpayers.

Tax audits are conducted by tax authorities to verify the accuracy of tax returns and ensure compliance with tax laws. There are different types of tax audits, including field audits, office audits, and correspondence audits.

Tax amnesty programs are designed to encourage taxpayers to voluntarily disclose previously unreported income, often in exchange for reduced penalties or immunity from prosecution.

Tax reform involves changes to the tax system, which can include changing the tax rates, the tax base, or the tax credits and deductions.