How do I upload an additional CSV file with my business expenses on it? I already uploaded 1, but now I can't see how to do an additional one.

Allow me to help you import your transactions into QuickBooks Self-Employed (QBSE), @elle-ellepaintsm.

If your account isn't connected to online banking, you can follow these steps to manually add your expenses: 

1. Click the Gear icon and select Imports.
2. Under the ACTION column, select Import transactions.
3. Follow the onscreen steps to upload the CSV file.
4. Select Import.

If it's connected to online banking, follow these steps to manually import older transactions into QuickBooks Self-Employed.

Once they're imported to your account, you can now categorize them. 

If you have further questions or concerns, feel free to reach back out anytime. Stay safe.