the phone call did not provide a person for whom the phone call was for. It only threatened that this was the final call from the IRS and that they were planning to sue me if I did not respond immediately.
This call must be a scam because I have not received any written notification from the IRS. the IRS does not call you with problems. You will receive a registered or certified letter but not a phone call and certainly not a final attempt where they would suit you.