The April 18th tax filing deadline is finally in the rearview mirror. Now you might be sitting back, waiting for that refund check to hit your account – or trying not to think about that big one you had to write. Then, all of sudden, you realize you made a tax mistake.
Maybe it was a simple tax mistake: you made a typo or a math error or forgot to report some income. What happens now? Will you get audited?
If the error relates to a form such as a W-2 or 1099, you will probably receive a Notice CP2000. This means that the income reported to the IRS does not match the information you reported on your tax return. The IRS will generally recalculate the amount of tax you owe and send you a bill for the difference.
Checking the Numbers
Before you pay up, make sure the IRS recalculation is correct. Maybe the difference relates to a stock sale and the IRS has recalculated your tax liability assuming the proceeds of the sale were 100% capital gains. Your basis in the security is not always reported to the IRS. In that case, they won’t ask whether you sold the stock at a gain or loss.
If you did make a mistake, but the IRS calculation is incorrect, you will need to amend your return. Prepare a Form 1040X Amended Return and send it to the IRS along with a copy of the notice plus an explanation for why your original return was prepared incorrectly and why you disagree with their recalculation. If this all goes smoothly, you’ll get another letter from the IRS confirming they’ve accepted your amended return.