Does Quickbooks online carter for manufacturing companies ?because i find it so hard to use it. There is no option for raw material and finished good. Please help.

I'm glad you posted here, Nomvula.

Currently, the assemblies feature isn't available in QuickBooks Online (QBO) to set up raw material for a finished good. However,  I really see your situation right now about having incorrect stock in your account. 

What we have right now in QBO is to set stock in the Bundle. Unlike with Assembly feature, this consists of different products in one pack and is unable to create finished goods.

Feel free to watch this video to learn how (The region of this video is different. However, it's applicable on your end): How to Use Bundles: Grouping Products & Services. 

As a workaround, you can look for a third-party application that can suffice the function of this feature. Here's how:

1. On the left panel, click the Apps icon.
2. Select Find apps.
3. In the Search field, enter the keyword of the app you're looking for.

You can also click this link to look for one: Find Apps.

Concerning your incorrect stocks, I recommend contacting your accountant to guide you on what's the best action to take to correct them in QBO.

You might want to know QBO track stock. You can read this article: What is FIFO and how is it used for stock cost accounting?

For additional questions about managing your stock in QBO, click the Reply button below. We'll be willing to help. Keep safe always.

@nomvulaakeswa-gm 

You need a 3rd party app with the assembly feature to integrate with QBO.

Which third party application do you recommend?

Please recommend third part app.

@nomvulaakeswa-gm 

If you have a simple operation, you can explore this inventory management app

https://go.zoho.com/H3R

For a complex operation, consider to use a manufacturing app

https://psref.katanamrp.com/quickbooks