error opening the 2021 download file in excel
getting Excel cannot open the file because the file format or extension is not valid error message trying to open the 2021 download PRC2021.0-ty6bfe.xlsx
Please see the note at the bottom of the Get PRC page on the website. This is a problem with the Firefox browser that can be worked around by using a different browser, by saving the file and then opening it, or by deleting the .xlsx extension prior to opening the file.
I had this problem, found the note about Firefox and and then googled how to change the extension (my Firefox had downloaded as an .xlsx and had a setting to hide the extension from view).
I changed the extension to .xlsm and am now able to open.
Just downloaded 2021 Gold, had this file extension issue, checked the forum and found a solution.
Every year the new PRC version keeps getting better, so I'm looking forward to this one. The forum is a great addition.