The scammers are sending fake IRS2000 notices that involve the Affordable Care Act (aka Obamacare). In many cases the fake notices arrive as an attachment to an email or by US mail. There may be a payment link in the mail. DO NOT OPEN THE ATTACHMENT or click any links. Doing so may install malware on your computer. The letters may also say to make a payment payable to “I.R.S.”.
If you get a notice about the Affordable Care Act in the US Mail and want to know if it is real….call 1-800-TAXFORM, which is the IRS, and ask them.