I have a business in which I own vehicles that are used for rentals. I am trying to add my vehicle inventory in so that I can record the purchase date, price, etc.

Hi there, @awcvans-gmail-co.

QuickBooks Online (QBO), makes it easy to set up the products or services item you buy or sell. 

If you need to track product quantities, you can add them as inventory items. If this belongs to items you buy or sell, but don't need to track their numbers, you can add this as non-inventory. If these are services you provide to customers, you can set them up as a Service item. 

Here's how:

1. Navigate to the Settings menu and then select Products and Services.
2. Click the New button.
3. Choose either Non-inventory, Service, or Inventory.
4. Then, follow the steps to set the item up as a non-inventory or service item, or an inventory item.
5. When done, click Save and Close.

Then, to help you monitor those items you buy or sell, you can run whichever inventory reports you'd need. To get started, please visit this page: Use reports to see your sales and inventory status.

Feel free to post here anytime you have concerns about adding inventory in QuickBooks. I will be happy to assist you. Have a good one.

@awcvans-gmail-co 

Another option, consider having a rental management app to integrate with your QBO.