"If you owe any back taxes" scam
Robo call.
206 395-7180
Attempt to return call gets busy signal.
Seattle, WA. WhitePages.com search found no information.
There is a call forwarder in Seattle that has been used by con artists in the past. This may well be one of their numbers.
Fenton Smith's profile and activity

Most Reported Callers
Recent Activity
Cell Phone
(701) 625-5163
is from Martin, ND
Return call gets all lines are busy message with no business identification. This seems like a strange message for a cell phone.
Ignores do not call list.
(205) 390-9997
is from Graysville, AL
unlisted. Spoofed caller ID. Ignores do not call list.
Unpublished
(603) 214-3653
is from Errol, NH
Robo call.
Usual debt resolution scam. Return call got busy signal.
Ignores do not call list.