2/19/2022: I just spent 9 hours on TT Home & Business 2021. But solved problems not recognizing two states (NY free, CA paid), and not allowing electronic submission of returns to IRS, NY, or CA. Solution was to entirely delete TT Home & Business 2021 from my Windows 10 PC; then double-click on the original paid download (after paying for it Dec. 2021, I had saved it in my DOWNLOAD Folder as "TurboTax_Home_Business_2021_PC_Download" exe), BUT MAKE SURE to save it IN THE ORIGINAL Download Folder and location. This is essential. Don't let it save in the newer Individual 2021 Folder (if you've unsuccessfully been trying other options). That solved the "The Intuit Electronic Filing System is having difficulty ... (and) FAILED VALIDATION ... " errors, which just kept me going in a circle for hours.
