Hi Brian!

I'll help you on questions 5 and 6 since Mirriam is already out of the office.

Good news because QuickBooks has a Location tracking feature that lets you tag locations in your transactions. Then, you can run the Profit and Loss by Location report to see your net profit per company. You can try this using the QuickBooks Online Test Drive account.

To enable the feature:

1. Click on the Gear icon and choose Accounts and Settings.
2. Click the Advanced bar and click on the Categories section. 
3. Put a checkmark in the Track Locations checkbox and choose a label.
4. Click Save and Done.

To add a list of location names:

1. Click the Gear icon and choose All lists under LISTS.
2. Select Locations.
3. Click the New button and enter the information of the first location.
4. Click Save, and create a new one for the other business.

After enabling this feature, you will see a Location field on the transaction pages, where you will choose the names you create. Please refer to the screenshots below. You can click on them for a better view.

I've noticed that you have a few questions posted here. We appreciate it that you're utilizing this medium to get help with QuickBooks. You can also run through the QuickBooks Online articles if you need quick references in the future.

Let us know if you have additional questions about the feature. Have a great weekend, Brian!