Thanks for reaching out to the Community, @brianansari.
Before going into detail, I want to ask if you mean how to delete a bill?
In QuickBooks Online, invoices are generally used for customers and bills are what you pay to vendors. I recommend paying the bill that's owed before deleting it.
For now, below are instructions with how to delete a bill:
- In the left menu, select the Expenses tab.
- Locate the bill from the Expense Transactions list.
- In the Bill page, click More at the bottom.
- Pick Delete from the pop-up menu.
- When you're ready, choose Yes to confirm that you want to delete the bill.
For detailed info with deleting a bill, refer back to this article: How to delete a bill.
I look forward to chatting with you soon. Have a safe and productive rest of your day!