The first thing to do is to check the return address to be sure it’s from the Internal Revenue Service and not another agency.

If it’s from the IRS, the notice will have instructions on how to respond. If you want more details about your tax account, you can order a transcript. Also, review your notice or letter to see if there is a specific website link to visit for additional information. This is usually located at the end of the notice or letter.

If it’s from another agency, such as a state tax department, you’ll need to call that office for an explanation.

If you disagree with the notice, call the IRS at the toll-free number on the top right corner of your notice. Please have your paperwork (such as cancelled checks, amended return, etc.) ready when you call. See also Publication 5, Your Appeal Rights and How to Prepare a Protest If You Don’t Agree.

If you can’t pay the full amount by that date, you need to figure out what payment options might work for your situation, and contact the IRS to set up a payment plan or discuss other ways to address your balance.

Being proactive in addressing the tax debt may prevent additional penalty and interest charges and eliminate the need for the IRS to take action to collect the balance. For specifics, see I got a notice from the IRS.