Tried to import transaction CSV for 3 missing months of 2023 it says "We've filtered out 269 transactions that we already got through your bank connection."

I can help you import the transactions successfully in QuickBooks Self-Employed (QBSE), @webattack2015.

You have missing transactions due to the disconnected connection between your bank and QBSE. To successfully retrieve those entries, select the Include all transactions option and continue with the process when importing your CSV file.

Here's how:
 

1. Go to the Gear icon and then select Import transactions.
2. Find your bank account and choose Import older transactions under the Action column.
3. Click Browse and select the CSV file you want to import.
4. You'll be routed back to the Import transactions window. From there, select the Include all transactions option.
   
5. Follow the onscreen steps to upload the CSV file.
6. Then, hit Continue.
    

You can check out these articles for more details on importing bank transactions in QBSE:
 

• Manually import transactions into QuickBooks Self-Employed
• Add older transactions to QuickBooks Self-Employed
   

Once the missing transactions are imported, you can categorize them. You can read this article for future reference: Categorize transactions in QuickBooks Self-Employed.

If you need help with importing your bank transactions or have any other QuickBooks-related questions, feel free to hit the Reply button. I'm always here to help you out!