Don't fall victim to tax scams. These schemes take several shapes, ranging from promises of large tax refunds to illegal ways of "un-taxing" yourself.

The IRS suggests that you remember three important guidelines:

1. You are responsible and liable for the content of your tax return.

2. Anyone who promises you a bigger refund without knowing your tax situation could be misleading you.

3. Never sign a tax return without looking it over to make sure it is accurate.

Beware of these common schemes:

Return Preparer Fraud

Dishonest tax return preparers can cause many headaches for taxpayers who fall victim to their ploys. Such preparers derive financial gain by skimming a portion of their clients' refunds and charging inflated fees for return preparation services.

They attract new clients by promising large refunds. Choose carefully when hiring a tax preparer. As the saying goes, if it sounds too good to be true, it probably is. No matter who prepares your tax return you are ultimately responsible for its accuracy and for any tax bill that may arise due to a questionable claim.

Identity Theft

It pays to be choosy when it comes to disclosing personal information. Identity thieves have used stolen personal data to access financial accounts, run up charges on credit cards and apply for new loans. The IRS is aware of several identity theft scams involving taxes or scammers posing as the IRS itself. The IRS does not use e-mail to contact taxpayers about issues related to their accounts. If you have any doubt whether a contact from the IRS is authentic call 800-829-1040 to confirm it.

Frivolous Arguments

Promoters have been known to make outlandish claims that the Sixteenth Amendment concerning congressional power to establish and collect income taxes was never ratified; that wages are not income; that filing a return and paying taxes are merely voluntary; and that being required to file Form 1040 violates the Fifth Amendment right against self-incrimination or the Fourth Amendment right to privacy. Don't believe these or other similar claims. Such arguments are false and have been thrown out of court. Taxpayers have the right to contest their tax liabilities in court, but no one has the right to disobey the law.

Rebate Phone Call

At least one scheme using the word "rebate" as part of the lure has been identified. In that scam, consumers receive a phone call from someone identifying himself as an IRS employee. The caller tells the targeted victim that he is eligible for a sizable rebate for filing his taxes early. The caller then states that he needs the target's bank account information for the direct deposit of the rebate. If the target refuses, he is told that he cannot receive the rebate. This phone call is a scam. No legislation has yet been enacted that would allow the IRS to provide advance payments to taxpayers or that determines he details of those payments.

Moreover, the IRS does not force taxpayers to use direct deposit. Those who opt for direct deposit do so by completing the appropriate section of their tax return, with bank routing and account information, when they file; the IRS does not gather the information by telephone.

Refund E-Mail

The IRS has seen several variations of a refund-related bogus e-mail which falsely claims to come from the IRS, tells the recipient that he or she is eligible for a tax refund for a specific amount, and instructs the recipient to click on a link in the e-mail to access a refund claim form. The form asks the recipient to enter personal information that the 'scamsters' can then use to access the e-mail recipient's bank or credit card account.

In a new wrinkle, the current version of the refund scam includes two paragraphs that appear to be directed toward tax-exempt organizations that distribute funds to other organizations or individuals. The e-mail contains the name and supposed signature of the Director of the IRS's Exempt Organizations business division.

This e-mail is a phony. The IRS does not send unsolicited e-mail about tax account matters to individual, business, tax-exempt or other taxpayers.

What to Do

If you have received a questionable e-mail or phone call claiming to come from the IRS please forward it to phishing@irs.gov, using instructions contained in an article on IRS.gov titled "How to Protect Yourself from Suspicious E-Mails or Phishing Schemes." Following the instructions will help the IRS track the suspicious e-mail to its origins and shut down the scam.

For more information about these and other tax scams visit the IRS Web site at www.IRS.gov.