Totally a scam claiming to be IRS. I reported it to the FTC for both phone numbers, 202-239-6060 which is the number the "IRS" scammers want you to call, plus 516-785-9420 which is the number the call came in on. Block these criminals from your phones. The IRS never contacts anyone via phone, text, or e-mail!
This is a scam. They left a message claiming that the IRS is suing us and we need to call immediately. Call back number they left was phone number 202-239-6020. Don't be fooled!