I'll help fix the incorrect non-taxable amount, aethen.
The most possible reason why it's showing a different amount is because of the date. We have to make sure that the transaction date of that sale is within the filing period. Let's open the sale transaction and verify the date, then go to the Taxes tab. You can modify the filing period on the From and To drop-down.
Aside from that, let's pull up a report to see all the sales transactions. That way, we can see check and verify if there's a separate transaction amounting to $20.90.
You'll want to check these articles to learn more about sales taxes:
Please post again if you have more clarifications. I'll be here!
Thanks for clarifying, aethen.
It looks like we're subscribed to another plan in QuickBooks Online. I have another report that we can pull up that'll help us check the applied tax for each transaction. Let's run the Transaction List by Date and add the columns recommended by @AlexV.
Let me show you how:
Under the Tax Amount column, we can check the 0.18 amount. Click the amount to open the transaction. From there, we can uncheck the box under TAX to recalculate. Then, click Save and close. We can refresh the report and get back in filing the return again.
Feel free to get back to me if you need anything else. Thanks!
It's good to have you back, aethen.
I would suggest reaching out to our Customer Care Support Team. They have available resources and tools to do a screen share with you. That way, they can further investigate this.
Here's how to contact them:
Please check our support hours to make sure we address your concerns on time.
Let me know how the call goes. I want to ensure this is taken care of.