The Tax Cuts and Jobs Act (TCJA) signed into law in December 2017 makes significant changes that impact both individuals and businesses. For businesses, it lowers the corporate tax rate to a flat 21% and provides a new 20% deduction for qualified pass-through business income. For individuals, it increases standard deductions, modifies individual tax rates, and places new limits on certain itemized deductions. The TCJA generally aims to simplify the tax code, provide tax relief for the middle class, and make U.S. business taxes more competitive globally.