My AR person entered $ from a customer in the "other deposit" tab in the deposit page, booking to the Undeposited funds acct. It should have been recorded as a Customer Deposit. The period is now closed. Anyone know of a way to turn this into a customer deposit?

If you cannot find a transaction method then one workaround is to use a ‘contra’ bank account. Write a Cheque to that contra account to reverse the original deposit. Use that contra account to Make Customer payment. Contra account back to zero. Inactive the Contra account so no one else uses it. Not perfect but achieves what you want in the current period.