It's great to have you in this forum, Gwen. The Square Connector by QuickBooks will utilize the primary account where you move money in and out of Square. I'll provide further details below.
The connector doesn't directly allow the use of undeposited funds, as it serves as a temporary holder of payments before they're deposited into your real-life bank account. When categorizing these entries, they'll be sent directly to the deposit account you choose from the app's settings.
For more information on how the integration works, refer to this article: Connect and manage Square transactions in QuickBooks Online.
Once you categorize and match your entries, make sure to reconcile your account regularly. This process is essential for accurate reporting and tax calculation.
We are committed to promptly addressing your needs as you manage your Square transactions in QuickBooks Online. If other related questions arise, leave them in this thread. We'll get back to you as soon as possible!