I too have this problem and it's pretty discouraging to see people have been struggling with this since 2020! I lost all my data through a failure of the software to connect to my account. I'd been using that account with QB Self-Employed for a number of years when suddenly it couldn't connect anymore. I've spent literally hours in support chats and spent 6 weeks waiting for the "Engineers" to find a fix. As my account is now disconnected all my data has gone and apparently, it can't be reinstated because I don't have a connection to a bank account and I can't get one of those because the software is broken. QB Self-Employed is a nightmare and I'm getting nowhere.