KEY POINTS
  • New York, Connecticut, Maryland and New Jersey had sued Treasury Secretary Steven Mnuchin and the IRS in July 2018. A federal judge dismissed the suit more than a year later.
  • The states are battling the $10,000 cap on state and local tax deduction that filers can claim on their federal tax returns.
New York State governor Andrew M. Cuomo

Four blue states that had unsuccessfully sued the IRS over a new $10,000 cap on the federal deduction for state and local taxes filed an appeal on Tuesday.

New York, New Jersey, Connecticut and Maryland originally filed suit against the Treasury Department, Treasury Secretary Steven Mnuchin and the IRS, among others, in July 2018.