Never send a payment to the IRS without designating what it is for. Otherwise the IRS may apply it in any manner they want. Every payment should include your name, your taxpayer identification number (social security number), the type of tax you are paying, and the period the tax payment is for.
Make sure the name and social security number on your tax return agree with the Social Security Administration's records. If you change your surname, notify the Social Security Administration and request a new social security card.
Don't claim a tax exemption for your child unless you are entitled to do so. Special rules apply to divorced parents. If both parents claim the child as a dependent, both returns will be subject to further IRS review.
Respond promptly to any notice you receive from the IRS, even if you think the notice is incorrect. If the IRS doesn't hear from you within the time specified on their notice, you may lose the right to protest any changes made to your return.
Send a change of address form (Form 8822) to the IRS when your address changes. If you fail to provide the IRS with your current mailing address, you may not receive a refund check or a notice if there are problems or adjustments to your return. And even if the IRS can't find you, penalties and interest will continue to accumulate on any tax due.
Send your income tax return and any other correspondence to the IRS by certified mail, return receipt requested. The receipt provides evidence that you filed on time. That proof will be valuable in the event the IRS or Postal Service loses your paperwork and the IRS threatens to assess late-filing and late-payment penalties.