I entered several Expenses (with receipts or invoices). They were actually bills. Now I have to match 10 expenses to one paid transaction.
It's good you're using QB Online to manage your transactions. Rest assured, I'll be happy to assist you with your transactions.
Based on your description, it sounds like you'd like to enter the transactions as bills instead. If that's the case, I recommend deleting the expenses you initially added and re-add the correct transactions.
To do delete the initial expenses, please follow these steps:
Go to Sales tab and choose Customers.
Click on the customer's name.
On the Transaction List, open the payment you've processed.
At the bottom part, click on More and select Delete.