Let's create an expense or check to record the purchase of a copier in QuickBooks Online.
You can use either Category or Item details to designate the purchase. If you want to use Category to post the transaction, select the Asset account. On the other hand, create a Non-Inventory item so it will post to the Inventory Asset.
Go to the Plus icon, then choose Expense or Checks.
In the Category field, pick the Asset account, then enter the amount.
In the Product/Service under Item details, click +Add new to set up an account if you don't have it yet.
Pick Non-Inventory, then complete the necessary information.
You can always run vendor reports to review the data, then customize it to show the precise details. Also, saving the customization report is helpful too. It will help you save time since it automatically updates every time there are newly added transactions.
I've added an article about managing vendor transactions, inventory or non-inventory, bills, expenses, credit, and other related topics.