Contact the IRS at ​1-800-829-0433​ if you think someone has filed your taxes without your permission. Contacting the IRS and inquiring about the status of your tax return is the best way to determine whether a return has been filed without your consent.

How do you find out if a company has paid their taxes?

Call the IRS Practitioner Priority Service at 866-860-4259. This is an IRS hotline number that you can call to quickly check tax filing compliance. Fax the IRS agent the 8821 form. The IRS agent can hold while you send the fax and give you the company account information when he receives the authorization.

How do I know if someone has filed taxes using my Social Security number?

If you believe someone is using your Social Security number to work, get your tax refund, or other abuses involving taxes, contact the IRS online or call 1-800-908-4490. You can order free credit reports annually from the three major credit bureaus (Equifax, Experian and TransUnion).

Can IRS contact your employer?

In general, the IRS can’t contact third parties such as your employer, neighbors or bank, to get information to adjust or collect the tax you owe unless it gives you reasonable notice in advance.

How can I find out how much tax I need to pay?

To calculate how much tax you need to pay, use the Estimated Tax Worksheet, which is part of Form 1040-ES. You’ll also use Form 1040-ES to file your quarterly estimated taxes.

How are estimated taxes paid by the IRS?

The IRS penalizes taxpayers who underpay estimated tax payments. You need to pay 90 percent of your current year tax, or an amount equal to 100 percent of the previous year’s tax, through timely estimated payments. File Form 2210 to determine whether you owe a penalty and how to calculate it.

What to do if you think someone is a tax cheat?

As explained earlier in this article, the IRS does not have the resources to pursue your hunch. If you, yourself, are a tax cheat, it might be best to stay in the clear. There’s nothing that says that people who submit claims of cheating by others will have their own tax returns examined more carefully.

How do you report a tax evader to the IRS?

If you decide to report the person or business you suspect of cheating, use IRS form 3949-A. This form asks for basic information on the tax evader you are reporting, the types of violations you believe to be committed, the details of the violation and how you learned about it.