How to update Service item Income Account and Also update this account in historical transactions but NOT prior to Close Date.

Hello there, @Chris374.

I'm here to help share insights about changing the account assigned to an item in QuickBooks Online.

As of the moment, there isn't an option to select transactions affected by the change of an income account assigned to a service item. This means all of your historical transactions or none of them is changed if you checked or unchecked the option in question.

While the said option is not yet available, I recommend getting in touch and letting our product developers know about this by sending a request via feedback. Rest assured our developers are constantly taking in the voices of our customers, like you, to ensure you got the best experience while keeping your business growing with us. I'll show you how.

1. Go to the Gear icon.
2. Under Profile, select Feedback.
3. Describe how to want to update selected historical transactions only after changing the account of a service item helps your business in QuickBooks.
4. Select Next.
5. Click Skip and send message.

For now, I'm including our Customer Feedback for QuickBooks Online page to track the status of your request and get the latest updates from our developer team. Updates such as how the recent enhancement made to QBO helps our business owners, like you.

It'll always be my pleasure to help if you've got other questions aside from working with your list and service items in QuickBooks. Use the Reply button and leave your comment below so that I, @JonpriL, can assist you further. Take care always and stay safe!

I've sent feedback but that's really a shame that QBO doesn't allow you to either choose a date for your historical transactions or even a check box for "all transactions" or "unclosed books only".