4156045488, called said they were Heather Grey, from the IRS, so not disregard this message, or we will take action against you.

It is a scam.

The IRS does not initiate contact via a phone call, they first send postal letters.
The IRS does not threaten arrest.
The IRS does not demand immediate payment over the phone.
The IRS does not ask for Credit card, Debit card, or prepaid money card information, at all.

It is a scam ran by offshore criminals attempting to trick you into sending them money.
Hang up and report the call here:
https://www.treasury.gov/tigta/contact_report_scam.shtml
More info:
https://www.irs.gov/uac/report-phishing
https://www.irs.gov/uac/newsroom/phone-scams- ... 6-filing-season

Got message from person calling themselves Heather Gray ( or Grey) of the Internal Revenue Service.  I checked the Internet and see this is a bogus number and others  have reported that they have received numerous calls from this same number also saying they were calling from the IRS . . . They issue a WARNING not to ignore the call and to return the call before action was taken . . .!!!!