The IRS estimates one in five eligible taxpayers don’t claim the earned income tax credit on their tax returns, missing out on thousands of dollars.

It also impacts the amount of delayed retirement credits you can earn in order to ... exceeding the "provisional income" limit set by the IRS. To calculate your provisional income, add up all ...

These rates apply to your taxable income. Your taxable income is your income after various deductions, credits, and exemptions have been applied. There are also various tax credits, deductions and ...