Amends the Internal Revenue Code to change how performing artists claim the above-the-line deduction for certain job-related expenses: it adds an income-based phaseout that reduces the deduction for higher earners, creates cost-of-living adjustments for several dollar thresholds beginning after 2025, raises the nominal-employer dollar threshold to $500, and makes clarifying technical edits. The changes apply to taxable years beginning after December 31, 2024.