The envelope doesn't say "IRS" -- it just says "Official Business" and "Penalty for Private Use, $300" on the outside of the envelope.
On the left hand top of the letter, it has the IRS logo.
The letter doesn't have a "notice number" - but it does have an "OMB Clearance No". It also has another number, which it states "In reply, refer to (number) "
I'll call the IRS on Monday at the number you listed.
It did list several numbers for me to call if I have questions about the letter. They all start with 1-800-829- ... But then the last digits are different from the number you provided.
It's just really strange. Has anybody ever filed through TurboTax - where the IRS claimed some of the schedules were missing or incomplete?
