Allow me to share some information regarding missing transactions in QuickBooks Self-Employed, eugeneslyen.
Once you connect your bank into QuickBooks Self-Employed, the system will download the last 90 days of transactions. To get those statements, you can ask your financial institution for a CSV file format and import them into QuickBooks.
See the steps below to complete the process.
Click the Gearicon ⚙ icon, and then select Imports transaction.
Select Import older transactions on the right for the account you want the transactions to belong to.
Follow the instructions onscreen to finish importing your data.