Sharon Epperson of CNBC joined Squawk Box to explain what taxpayers should know as the IRS begins accepting 2025 returns. She clarified that the new no-tax-on-tips, no-tax-on-overtime, and no-tax-on-Social-Security provisions are limited deductions with income phaseouts, not full tax eliminations. She also said average refunds may be $300 to $1,000 higher this season because withholding tables were not updated when the tax breaks took effect. The segment ended with tax-planning reminders and no specific securities or investment recommendations.