Hi there, Sonia.

I can help you manually add your deleted bank transaction in QuickBooks Online (QBO).

Let's begin by getting the transaction from your bank. Here's how to do it:

1. Sign in to your bank or credit card's website.
2. Follow the instructions on how to download CSV files of your transactions to your computer. Every financial institution has different steps.
3. Make sure the date range for the download begins at least one day before your oldest transaction.
4. Download your transactions. Save the file somewhere you can easily find it, like your computer's desktop.

Then, open and examine the file provided by your bank. Verify that it is in the appropriate format before uploading it. Remember that the maximum file size allowed is 350 KB. If the file exceeds this limit, consider narrowing down the date range and downloading transactions in smaller portions.

Once done, you can proceed to manually upload the transaction to QBO. The steps for doing this may vary depending on whether your account is connected to online banking or not. You can refer to this article and proceed to Step 4 for further guidance: Manually upload transactions into QuickBooks Online.

I'm also adding these articles that tackle categorising and reconciling your account for future reference:

• Categorise and match online bank transactions in QuickBooks Online.
• Reconcile an account in QuickBooks Online.

Please let me know if you have additional questions about this or anything else. I'll be more than willing to assist. Take care.