@ppwaskie
I had to work really hard with multiple edit passes to track down all the special characters before the import would work. I also have a few really long descriptions. I did not have to shorten them.
As shared earlier, I also tested 2023. I didn't mention it then, but yes 2023 does accept special characters. I believe 2024 TT Desktop is the first time TT now has an embedded version of ItsDeductible inside and apparently has undocumented restrictions that the online version does not. Plus that silent fail to import bug (no error message on failure).