Can't I assemble items in quick books pro? And if not, what alternative do I have

Thanks for posting in the Community, @anisachkar77. 

Right now, the option to assemble items is unavailable in QuickBooks Desktop (QBDT) Pro. But I've got two alternative methods you can perform to achieve your goal. 

First, I recommend looking for a third-party app that can integrate with your Pro version. This way, you'll be able to build assemblies using your products in the program. I'll guide you how. 

1. Go to this link: https://desktop.apps.com/home. 
2. Click Log in or Sign up. 
3. Choose the All Applications tab. 
4. Select the appropriate choices in the Categories, Pro in QuickBooks Compatibility, and Developer sections.
5. Enter Assemble Items in the Search box.
6. Click Search. 
7. Select View profile to learn more about the apps. 
8. Choose the right app for your business. 

The screenshot below shows you the second to sixth steps. 

Second, I'd suggest upgrading your company file to another edition. You can choose either Premier, Enterprise, or Accountant. 

Once done, you'll have to turn on the inventory tracking feature in the preferences. Then, set up your product's components and add their bill of materials. That way, you can start assembling your items in the software. For more details, see Steps 1 - 4 through this article: Track The Products You Manufacture. This link is specific to the US region, but it also applies to your country. 

After that, create an invoice or a sales receipt to keep track of each sale. 

You can always run and customise any item reports in QBDT. These will help you review your inventory statuses and their pending builds. For more details, visit this article: Customising Item Reports.

I'm here anytime you have other concerns. Keep safe always, @anisachkar77. 

@anisachkar77 

Consider upgrading to QB Premier with a one time license to have the assembly feature. For 1 user, you may purchase the license for $500 directly, or less than $400 thru a partner/reseller.