Each year there are tax changes that require new software. If you need to prepare a return for a year before 2016, you can buy prior year H&R Block Tax Software programs from the H&R Block web site store.
Just choose the tax year you need to prepare, choose Windows or Mac, and then click Download Now to buy the software.
The IRS only accepts e-files for current year returns. Any prior year returns need to be printed and mailed to the IRS and/ or Department of Revenue.