Why does my account pairing not always work? Is there a setting somewhere in configuration or is it part of a rule?

Hi egbertbos,

Thanks for posting in the Community! To ensure that we're on the same page, are you trying to match a transaction to your bank feed? If yes, there are possible reasons why our system is unable to recognise the match in QuickBooks. These are due to the following: 

• The transaction is already reconciled.
• The dollar amount in QuickBooks is different than what cleared the bank.
• The transaction was recorded in a different bank account.
• The transaction from the bank is a payment/ deposit of two or more open transactions in QuickBooks.

Also, you can also manually find match by clicking on the bank transaction and select Find match. It will show you then a list of potentially matched transactions. 

For more detailed information, you can check these articles: 

Find and categorise transactions in QuickBooks

Set up bank rules to categorise online banking transactions in QuickBooks Online

Feel free to drop a comment below if you have any other questions. Have a nice day!