Thanks for posting, @SammyT.
I'll walk you through the steps on how you can separate your downloaded transactions. All you have to do is split the transactions from the Banking page. Let me guide you how.
- Go to Banking, then select the Banking tab.
- Select the payment, then tap the Split button.
- In the Split transaction page, separate the Amount and their corresponding Category.
- Click Apply and accept. See the image below.
Check out this article for more information about this feature: Categorise and match online bank transactions in QuickBooks Online.
I've also added this link in case you need help with other banking tasks, Just look for a topic that'll fit your concern.
Please know that you're always welcome to reply if you have follow-up questions or concerns with bank transactions. I'll be here for you. Take care and have a nice day ahead.