Who called from 2133005837

Checking my voicemail, I also got a call from this number claiming to be the IRS and stating that this was the final notice, the IRS was filing a lawsuit against me. (date/time stamp Aug 29, 2016 at 9:59 AM (Eastern))

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

IRS scam - says this is my final notice that a lawsuit has been filed against me and to call this number to get details.

It is a scam. They called me, and I know I have no tax problems. The IRS doesn't make initial contact by phone, they use the mail.

I also got a call from this number claiming to be the IRS. They left me a voice mail saying they were filing a lawsuit against me.