This is not a new change - as it's been around for at least 3 years I'm aware of and probably longer. When looking at your prior year's tax returns online, there's always a PDF for each year, along with a corresponding .taxnnnn file where "nnnn" is the tax year that .tax file is for. This is assuming you used the online version to file that tax return with. If you used the desktop version and then switched to online, then to import you had to upload the prior year's .taxnnnn file. In that case, there would be no corresponding PDF file.
