All of my sales are non-taxable. Is there a way to have this as a default when entering new items?

Hello there, @colleen-heinrich.

If you wanted to set all of your sales items as a default to non-taxable, there’s no need to set up sales tax in your QuickBooks Online. However, if there is a specific sales item that you wanted to add a tax, it will depend on what kind of product you sell and where you sell it.

To add a sales tax to a specific item/product, here’s how.

1. Select Sales, then Products and Services.
2. Select New, then choose the type of item you need to add. If you need to update an existing item instead, find the item then select Edit.
3. Select the Sales tax category dropdown arrow, then Choose a special tax category. Find and choose the specific sales tax category that fits your item.
4. Complete your item’s info.
5. Then, click Save and close.

Click this article for additional reading on adding sales tax item. Add sales tax categories to your products and services.

For your future references, you can also use custom rates to manually calculate taxes on invoices or receipts.

Feel free to fill me in if you have any other questions. Take care and keep safe.