How can I clear out undeposited funds? All invoices are paid, I don't understand how this happened

Welcome to the Community, @eandbevridge-att.

I'm here to help you clear your undeposited funds account in QuickBooks Online.

The undeposited funds account holds the payment record until you physically deposit the same payments to your real-life bank.

Here's how to record a bank deposit:

1. Click the +New icon and then select Bank Deposit.
2. From the Account drop-down▼menu, choose the account you want to deposit the money into.
3. Place a checkmark on each payment you want to combine.
4. Select Save and Close.

If you have made a bank deposit directly to the register and left the undeposited funds pending, it may result in a duplicate transaction. Thus, you can delete the deposit and use the pending one in the undeposited funds account. Then, recreate a deposit and choose the pending payment.

Here is an article you can read about undeposited funds and the detailed steps of recording a bank deposit:

• Record and make bank deposits in QuickBooks Online.
• What’s the Undeposited Funds account?
• Deposit payments into the Undeposited Funds account in QuickBooks Online.

For future reference, I'm also adding this article to guide you in categorizing your transactions: Categorize online bank transactions in QuickBooks Online.

Let me know if you have questions about undeposited funds in QuickBooks Online. I'm always here to help. Have a great day.