Inventory Management

QBO doesn't offer any assembly feature. You will need to have a 3rd party manufacturing app to integrate with QBO. Another option, the feature is available on QB Desktop Premier and Enterprise. If you are working solo, you can use the trial version for good with a workaround.

Greetings, Martini. Thank you for taking the time to post your inventory concern on our QuickBooks Community website. We'll ensure to give you insights regarding inventory assembly in QuickBooks Online (QBO).

We can understand the importance of managing inventory assembly in our program. However, we agree with Fiat Lux - ASIA that building an Inventory Assembly Item is unavailable in QBO but is available in QuickBooks Desktop. 

You may consider using a third-party application in creating assembly and item group transactions. You can search for applications through the Apps menu of your QBO, then click the Find Apps tab. You can also look here in our QuickBooks Online App Store.

Additionally, feel free to check these articles for more details on managing products and services in QuickBooks:

• Add product and service items to QuickBooks Online
• Set up and track your inventory in QuickBooks Online

Post a response if you need other assistance in managing inventories in QuickBooks. We're always here for you, Martini. Keep safe!