Massachusetts doesn't give a discount for FastLane,
Actually, the Turnpike does. The resident discounts on the harbor tunnels now require Fast Lane (and have since it was introduced, IIRC), and the two toll barriers on the Extension give a 25-cent discount for Fast Lane customers.
but last year they instituted a tax deduction if you use it enough to
> be considered a commuter (I think $150 or $250).
I believe it's actually written such that you don't have to use Fast Lane, but you're unlikely to have saved all those receipts in any other form.
-GAWollman
Garrett A. Wollman | As the Constitution endures, persons in every snipped-for-privacy@csail.mit.edu | generation can invoke its principles in their own Opinions not those | search for greater freedom. of MIT or CSAIL. | - A. Kennedy, Lawrence v. Texas, 539 U.S. ___ (2003)