Hi daniellecl Below are the main reasons why you won't be able to find a match/auto match a transaction within the banking section:  

There are 6 main reasons why you cannot find a match

Dates don't match (or are not close)

The bank account/credit card on the payment is not the same as the bank/credit card where the match is located

The amounts don't match

The payment has been reconciled

Multicurrency issue with exchange rates

Its already been matched to something else