From doing different troubleshooting steps, I found out that it would allow me to import my fiscal year minus 4 days at the very end.
I went through each entry in QB, deleted, and recreated each for the last 4 days.
TT now is able to import my full fiscal year properly.
Conclusion: The scripting issue was due to something in the actual books file of QB. Everything was deleted and reentered the exact same way, but must have been on the back end.
For anyone else with this error message, decrease the dates you are inputting into TT, until it works, then expand you dates from there to see which date is the first that the error starts on. Check that date in your QB for all entries, and delete and recreate.