Be careful. This is a public Internet forum. Don't go by a FAX number provided in a public user community forum like this to send such sensitive documents. Someone could even try to scam you into FAXing it to them instead of the IRS to steal your info. Or someone might tell you to send it to the wrong IRS department.
Did you receive an IRS letter? If so, it may have the FAX number to use or the number to phone for info.
