How do we enter our expenses such as the products we buy to sell on Amazon, the gas we use to get those products, and other expenses i.e., tape, boxes etc.?

Joining you here to help you record your expenses in QBO, karminaindustrie.

Most of the time, you can record inventory-related expenses as checks, expense, or bill payments in QBO. Let me share the steps on how you can record them. Here's how:

1. Click the + New button and select Check, Expense, or Bill.
2. Enter all required details such as the name of the vendor, category or account that you'll be using, amount and description.
3. Select Save and close. 

Let me also share this article for more details: 

• Enter and Manage Expenses in QuickBooks Online
• Learn the Difference Between Bills, Checks, and Expenses in QuickBooks Online 

We have also created a list of vendor or expense-related video tutorials in this link: 

https://quickbooks.intuit.com/learn-support/en-us/quickbooks-online/help-tutorial/expenses-and-vendo.... 

I would also like to give you these articles in case you want to run a report about your expenses in QBO:

• How to Run and Save a Monthly Expense Report by Vendor 
• Run a Report with Vendor Totals 

Don't hesitate to let me know if the steps helped you record the expenses in your account. You can also ask more questions if you need anything else.