What Is the SALT Deduction? The state and local taxes (SALT) deduction is a federal tax benefit for taxpayers who itemize their deductions. It allows these taxpayers to deduct the cost of their state and local taxes, including income tax or sales tax, as well as property taxes, from their federal income for tax calculation... The post SALT Deduction: What Is the State and Local Tax Deduction? appeared first on Griffin Funding.