Thanks for chiming in on this thread to ask for assistance, @BossLadyJatGHA. Let's work together to reflect the full deposit in QuickBooks Online (QBO) and record the amount debited from your Checking account. 

First, let's create a check to record the $800 taken back from your account. Then, utilize the Accounts Receivable so the amount will show as an open balance in your customer's invoice.

Here's how:

1. Go to Banking and select Write Checks.
2. Under the Account column, choose Accounts Receivable.
3. Enter the amount and select the customer's name.
4. Hit Save & Close.
   

Once done, proceed to reconcile the account to check for any discrepancies.

For your future guide, here's an article that suggests what to do if your accounts in QBDT don't correspond with your bank statements at the end of reconciliation: Fix issues when you're reconciling in QuickBooks Desktop.

Keep me posted in the comment section below whenever you have any follow-up concerns about recording the incorrect check amount in QBDT. We're always around 24/7 to assist you further. Keep safe and have a nice day ahead.