Dell Home offers downloads of Intuit TurboTax Deluxe Federal + State + e-File 2012 for Windows and Mac, model no. 420488, for $39.99. (Amazon charges the same.) That's tied with our mention of the retail box version from two weeks ago and the lowest price we could find for a download by $10. Sales tax is added where applicable. This software guides you through your self-employment and personal income taxes. Deal ends January 30.
Update: Dell Home has decreased slightly to $38.99.