Can i see the trial on inventory managment?

You can signup for the trial account of QBO Plus to explore the inventory management feature. If it doesn't meet your need, consider to have a 3rd party inventory management app to integrate with QBO.

We can certainly help you manage your inventory in QuickBooks Online (QBO). 

Yes, Fiat Lux - ASIA is right. We'll need to have a trial version of QuickBooks Online Plus to explore the Inventory Management feature. Just go to this link: https://quickbooks.intuit.com/global/online-compare/. Then choose Plus and click the Free 30-day trial. 

Once you have it, follow the steps below to turn on the inventory tracking feature. Here's how:

1. Go to the Gear icon and then select Account and Settings.
2. Choose Sales.
3. Tap Edit ✎ in the Products and services section.
4. Turn on Show Product/Service column on sales forms.
5. Turn on both Track quantity and price/rate and Track inventory quantity on hand.
   
6. Press Save and then Done.

Once done, you can now add and manage your inventory products. To learn how, please see Step 2 in this article: Set up and Track your Inventory in QuickBooks Online. Additionally, I've included this article that'll help you see your best sellers, what’s on hand, cost of goods, and more: Use Reports to See your Sales and Inventory Status.

I'm only a few clicks away if you need assistance managing your inventory. It's always my pleasure to help you out again.