Same here just received a call from this (206) # says that the IRS is filing lawsuit. I called back a guy answers then hangs up. I call back again it's a busy signal. I'm sure the this is some type of scam.
They left a voice mail for us saying the same thing: internal revenue services. "The reason of this call is to inform you that irs is filing a lawsuit against you." Then lists the call back number. I'm pretty sure that if the irs was using us we would receive a certified letter.