Yes, QuickBooks Online can make automatic adjustments to your accounts, RESLtd.
The message "Created by QB Online to adjust balance for deletion" is made automatically by QuickBooks Online. This happens if you delete an account that has a balance or a completed transaction. QuickBooks does this to ensure your records are accurate and that your reports still balance correctly.
This entry appears in your Retained Profit balance b/fwd (brought forward) account because this is the account QBO uses to manage and record the total of your business's total profits and losses from previous fiscal years. Since you cannot delete a retained earnings account, QBO uses this account as a holding place to correct the balance and maintain the integrity of your financial records.
For the most accurate financial records, I recommend consulting with your accountant to handle any necessary adjustments.
If you require further assistance managing reports or related matters, reply to this thread. I am here to support you at any time.