How to adjust on QB an item that has captured erroneously as inventory to capital good - such as computer purchase?

Let me share the information on reclassifying your item in QuickBooks so you can successfully categorize the product to correct account, duzane. 

If you’re using a Plus or Advanced subscription, please note that changing the type of an item isn't available. However, if you're looking to update the Inventory Asset account associated with an item, here’s a straightforward guide to help you:

1. Go to the Sales menu and select Product and services.
2. Scroll down, find the Inventory asset account, and click the dropdown arrow.
3. Select the correct account or choose Add new to create a new account.
4. Click Save and close when you're done.

I'm adding this article for more guidance: Change product and service item types in QuickBooks Online.

Moreover, if you want to keep a close eye on your inventory, this article provides detailed steps for running and customizing reports: Use reports to see your sales and stock status.

On the other hand, if you meant something else regarding managing items, please feel free to share more details. A screenshot would also be incredibly helpful in assisting us to provide a more accurate solution.

You can return to this post for follow-up questions about personalising your products and services in QuickBooks. I'll be right here to guide you always.