Welcome to the Community, @stephanie52.

Let me provide clarification in handling imported transactions from Square.

If this is still an open invoice, you'll have to receive the payment first before matching it.

To match the full payment including the CC fee, you'll need to make a deposit in QuickBooks for the invoice payment and add the fee on the Add funds to this deposit section as an expense account. Be sure to enter a negative amount for the fee.

Here's an example.

You can also refer to this article for more information about matching an existing transaction: Match and categorize bank transactions in QuickBooks Online.

If you've matched a transaction by mistake, you can always unmatch it and find a new match.

Let me know if there's anything else you need. I'm here and ready to help. Have a good one.