Dell Home offers downloads of H&R Block Tax Software Premium & Business 2016 for Windows bundled with a $25 Dell Gift Card for $64.95. (The gift card will arrive via email 10 to 20 days from purchase.) Assuming you'll use the gift card, that's $21 under the lowest price we could find for a physical copy, although we saw it for $6 less in February.
No interest in the gift card? Walmart offers downloads for $48.25.