Hello there, zilch000.
I can help you update your items.
As mentioned by my colleague, Kristine Mae, The Also update this account in historical transactions option is available for service and non-inventory items only.
If you're trying to update these types of items, change the income account then switch it back to the correct one to trigger the option. Make sure that the Also update this account in historical transactions checkbox is already selected before you click Save and close.
For inventory items, the only way you can update existing or past transactions is to open each transaction and re-toggle and toggle the item for the changes to apply.
You can check out these links to help you manage your product/services list:
Let me know if there's anything else that you need. I'll be around the corner to help. Take care!
