Use this tool to calculate the federal income tax you want your employer to withhold from your paycheck. April 15 is generally the deadline for most people to file their individual income tax returns and pay any taxes due. During processing, the IRS checks the mathematical accuracy of your tax return. When the processing is complete, if you owe any taxes, penalties, or interest, you will receive an invoice.
The United States income tax system is a pay-per-use tax system, meaning that you must pay income tax as you earn or receive your income during the year. Use Form 2210, Underpayment of Estimated Taxes by Individuals, Estates and Trusts, to see if you owe a penalty for underpaying. If you didn't pay enough taxes during the year, either through withholding or through estimated tax payments, you may have to pay a penalty for paying less than the estimated taxes. You can avoid future tax liabilities by adjusting your withholding, making estimated tax payments, or federal tax deposits.
You may be eligible for penalty relief if you tried to comply with tax laws but were unable to do so due to circumstances beyond your control.