Taxpayer scammers start their scheming long before tax season—right around the tax-filing extension deadline on October 15th is when many tax predators begin preying on consumers, according to a recent Consumer Tax Alerts from the the Internal Revenue Service (IRS). 

Thousands of taxpayers have lost millions of dollars as a result of these scams across the country. The IRS says it stopped 787,000 confirmed identity theft returns, amounting to $4 billion in potential losses for consumers, in 2016.

Despite the efforts of the IRS, many consumers continue to fall victim to scammer tax traps. Criminals use phone calls, e-mails, social media and even postal mail to deceive businesses, individuals, tax professionals and even payroll specialists, according to a report from the IRS.

As a result, the IRS has issued a list of consumer warnings based on the most common tax scams. The IRS also reminds consumers that it will never contact taxpayers via e-mail, text message or social media channels to request personal or financial information. Anyone who has received communication through these avenues is likely being scammed, according to the IRS.

These, according to the IRS, are the most common consumer tax scams:

October 15th Deadline Scams

Tax scams become especially prevalent near the IRS extended-filing deadline on October 15th. Scammers pose as IRS workers and make harassing phone calls and use e-mail phishing schemes to coerce taxpayers into making payments in time for the deadline.