Hello there, @tigerlilys.

Let me guide you about adding a quantity into lines on a bill in QuickBooks.

As mentioned by my colleague above, you can see the quantity column when you create an invoice. However, if you're referring to enter a quantity into lines on a bill, it isn't available in QuickBooks Essentials. This feature is only available in QuickBooks Plus and Advanced if you want to Track Inventory.

You can visit our site for more information about our product:https://quickbooks.intuit.com/au/pricing/.

I'll add our Help Articles for your "How do I" questions in the future.

Let me know if you need further assistance. I'll be happy to lend a hand. Take care.