Hence we perceive that the clause which declares the supremacy of the laws of the Union, like the one we have just before considered, only declares a truth, which flows immediately and necessarily from the institution of a federal government.
More immediately, taxpayers in high-tax states are rushing to see whether they can seek extra relief ahead of a new cap on the state and local tax deduction that will go into effect on Jan. 1. Taxpayers will get to deduct only up to $10,000 in both property and income or sales taxes going forward, and GOP negotiators specifically banned people from prepaying 2018 income taxes this year for an extra tax break.
2017 IRA Deduction Limits - Effect of Modified AGI on Deduction if You Are Covered by a Retirement Plan at Work. If you are covered by a retirement plan at work, use this table to determine if your modified AGI affects the amount of your deduction. See IRAs for more information. If Your Filing Status Is...