This bill amends the Internal Revenue Code of 1986 to rename the standard deduction as the guaranteed deduction , effective for taxable years beginning after December 31, 2025. This change applies broadly across various sections of the tax code, updating terminology for this fundamental tax provision. Additionally, the bill introduces a temporary bonus guaranteed deduction for the 2026 and 2027 taxable years. This bonus provides an extra $4,000 for joint filers, $3,000 for heads of household, and $2,000 for other filers, with amounts subject to inflation adjustments for 2027. However, this bonus is reduced by 5 percent for modified adjusted gross incomes exceeding specific thresholds, such as $400,000 for joint filers, ensuring the benefit is targeted.