I got a similar call while I was out and the caller identified himself as Justin Johnson from IRS Tax resolution and to call him immediately regarding a very sensitive issue regarding taxes owed and if I didn't call back there would be legal consequences. He had a very strong Indian accent, very difficult to understand. Do not answer if they call but report to IRS and FBI.
What you are describing is the same thing that happen to me. I think by returning the call probably we will be charged a fee. That is the only thing that makes sense
A Chinese, Vietnamese, Japanese or whoever this Asian foreigner is (because they all sound the same to me) called my number and left a message which I didn't understand a word beside IRS so I decided to check the number and realized that it's all a scam. The people doing this are so stupid and ignorants that they try to pass for IRS representatives but the people making the calls are a bunch of alliens making minimum wage and probably from the San Francisco, China Town area since they all have a terrible and very poor command of the English language. The digits 415 is a California telephone area code and it serves San Francisco and its northern suburbs in Marin County.
Got a call fron this number 1415 230 2877 yesterday, fist they asked for some Alvardooo Albardoo and ordering me to grab pen and "pencil" to take a mesage lol I didn't get what he was saying, he's English was even worse than mine; then, I figured he was trying to say Alberto which is my husbands name. I assumed it was one of my kids playing a joke on us and I player along took that message and waited for the punch line, but he finally said "to not disregarded the message and call him as spoon as pussyball" before any legal actions and hung up.
Today he called again twice, First her hung up when I answered and the second time he just left a very threatening message, of course with that horrible accent and same argument say in he was from I X litigation (or navigation ) department and not to record the message. Go figure ....