IRS have filed a lawsuit against you with case number and telling me to call back.I called back and spoke to an Indian accent lady and told me she's from the IRS I know there was something wrong when I spoke to a live person right away I normally get prompter before I spoke to someone in IRS
THIS IS A HUGE SCAM!!! DO NOT FALL FOR IT!! They will call multiple times and threaten you. Please be aware that the IRS never EVER calls people like this and NEVER has a third party suing in their name. Report this number immediately and tell everyone you know about it. These people need to be jailed for multiple offenses on this one, it's right up there with the "grandchild calling for bail" scam.
Please look up "IRS Lawsuit Scam" and click on the IRS' info about it. The bottom of the page will give you links to TIGTA and the FCC to report this scam. Local authorities and media may also be very interested in this, so you may want to call them as well.