This email with the subject "ATTN: Early 2013 Tax Return Report!" was received in one of Scamdex's honeypot email accounts on Thu, 09 Jan 2014 14:40:55 -0800 and has been classified as a Generic Scam.
The sender was "Internal Revenue Service" <firstname.lastname@example.org>, although it may have been spoofed.
Here is a report on your early 2013 Federal Tax return report. Kindly download the attachment to view your report and start filling for 2013 return as early as second week of December.
Internal Revenue Service
915 Second Avenue, MS W180
Seattle, WA 98174-0041