Greetings Everyone, I would like to know if I can add multiple business sectors / branches under one company? And will the reporting be branch/sector wise?

Yes, you can use the Class or Location tracking feature, tariq-nca1-gmail.

The Class and Location feature help you to track different departments, across states, or in different properties. It is recommended to set up different company files for every business entity, to avoid any discrepancies on your books. 

You can use the Locations as a consulting business, installation business and retail sales. Classes could be the different services you provide and the products that you sell. 

To use this feature, your current plan must be Quickbooks Online Plus or Advanced. Here's how to turn this feature on:

1. Go to the Gear icon and select Account and settings.
2. From the Advanced menu, click the Categories section.
3. Check the Track classes box. Check the Track location box as well if you prefer to use it.
4. Under Assign classes select One to entire transaction or One to each row in transaction.
5. Select Save, then Done.

For more details on how these features work, check out these articles:

• Get started with class tracking in QuickBooks Online
• Set up and use location tracking

Please don't hesitate to mention me in your reply if you have other questions. I'd be glad to help you with it. Take care!