Tax Freedom Day Assess how many days you'll work to pay your federal tax liability. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. Should I Pay Off Debt or Invest? This calculator will help determine whether you should invest funds or pay down debt. Four Steps to Valuing an Estate Determining the value of your estate, or for someone who has passed away, can be a complex undertaking.