Where have my transactions gone and the ability to put more in. Yesterday they were there, today they're gone.

Thanks for reaching out, @Wherearemytransactions.
 

Based on your scenario, I recommend clearing your cache history. This will help the system start fresh and may resolve any problems with the webpage, as temporary files can sometimes cause unusual behavior. We can also explore other supported browsers  to improve your experience with QuickBooks.
 

For further concerns, please don't hesitate to message us again.