Hi there, Rogelio. Currently, the ability to add a variant to your inventory items is unavailable. With this in mind, I recommend exploring a third-party application that can assist you with this task.
We can also send feedback about this feature to our developer team so they can add it in later updates. Please follow the steps below:
Open your QuickBooks account.
Go to the Gear icon and select Feedback.
Enter your suggestion in the field provided.
Once done, click Next.
Moreover, you can visit this article to help you find the most suitable app to integrate with QuickBooks: Integrate apps in QuickBooks Online.
You're always welcome to comment below if you have other questions or concerns.
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