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Welcome to the Community forum, @u40au01.
QuickBooks Self-Employed (QBSE) is a read-only app. Upon importing data, the transactions posted in the system depends on what you've imported.
To isolate the issue, I recommend checking the .CSV file data you're using.
For more information about importing data in QBSE, you can see below articles:
Let me know if there's anything else I can help, I'm more than happy to further assist. Have a wonderful day ahead!