what product and service type should I choose in quickbooks online if I do not want to track inventory

is that what you're looking for

In QuickBooks Online, it’s easy to track how much you make and spend on each product or service. You can also enter these products and services you sell as items so you can quickly add them to sales forms. This gives you more detailed financial reports and helps you complete transactions faster.

Here's how to add services and products you don't plan to track inventory for (also known as non-inventory items).

Note: If you want to track product quantities, add them as inventory items instead.

Non-inventory: Products or items you buy or sell, but don't need to track quantities. For example, nuts and bolts you use for installation jobs but don't sell directly.