Hi there amatuskova-yahoo,
Thanks for reaching out about matching transactions. QuickBooks Online is a great tool able to connect to various bank websites to save time with data entry. I can provide some information about bank transactions.
In QuickBooks Online, there isn't the option to match multiple transactions from the banking tab to one transaction in your books. If you've done a cash advance, you may need to use these steps to add a cash advance repayment deduction to reduce the amount of net pay on the actual cheque day so you can pay it out as an advance.
If you have any other questions, feel free to reach out here.