The purpose of this legislation is to change the way married couples are taxed in the United States. Specifically, it aims to eliminate what is known as the "marriage penalty" in the income tax system. The marriage penalty occurs when married couples end up paying more in taxes than they would if they were single, due to the way tax brackets are structured. This bill seeks to make the tax system fairer for married couples. The key provisions of this legislation include a significant adjustment to the income tax brackets for married couples.