@jrhughes glad to do this for the community as a whole.
In terms of your local H & R Block, I would imagine it would really come down to a question of whether or not one of their tax experts has decided to focus their practice into this area. When I started trading my first Bitcoin in 2013, it became a niche for me simply because of my own needs - there was no client demand at that time.
Nowadays, cryptocurrencies are becoming somewhat more "mainstream" with crypto experts everywhere. I'd be surprised if H & R Block did not have at least a cursory class on taxation of cryptos for their tax pros. Personally I'm not advocating for or against H & R Block. Find a tax advisor you can trust and is licensed (CPA or EA). That's my opinion.