Not at all true, unfortunately. Tax preparation is by far their largest source of revenue. Not sure where the sale of this data might fall, I’d suspect “other”, but it’s not a substantial part of their business model. In case it needs to be said, I’m not defending the practice, I do object to it, but I was curious about HRB’s financials so I just took two minutes to look.
https://investors.hrblock.com/static-files/447ea4e0-030a-4978-97d4-2032556a44d0