@Nataglia  RE: Hello, when creating an invoice (receivable) in QBO, am I able to change the receivable account that the invoice goes in?

No, not with QuickBooks Online. You can of course do that with QuickBooks Desktop. With Desktop, when you have more than one A/R account you can pick the desired account for invoices, credit memos, payment, and so on.

However, with QuickBooks Online, while you can create multiple A/R accounts, QuickBooks will only use one for A/R transactions - the one it created.

It's one of the many hundreds of sometimes weird QuickBooks Online limitations when compared to QuickBooks Desktop.