* More AA6YQ comments below
+ First, let's determine why your QSOs weren't accepted the first time you submitted them to LoTW:
1. On the Main window's QSL tab, click "Sync LoTW QSOs", and wait for it to complete
2. On the Main window's "Lot QSOs" tab, click the Filter panel's LoTW button; this will filter the Log Page Display to contain QSOs uploaded to LoTW, but not accepted by LoTW
+ How many QSOs are now present in the Log Page Display?
* That's a lot of submitted but unaccepted QSOs. How many QSOs does your log contain in total?