How to Zero out Negative Tax Amount Due?

Let's zero out the negative tax amount due, @Erss.

To maintain tax adjustments accurate, I suggest using the Adjust Sales Tax Due tool from the Vendors menu.

Let me show you how:

1. From the Vendors menu, select Sales Tax and then choose Adjust Sales Tax Due.
2. In the Sales Tax Adjustment window, enter the following details: adjustment date, sales tax vendor, adjustment account, and other relevant information.
3. In the Adjustment section, you can choose if you need to increase or reduce sales tax then enter the adjustment amount.
4. Then hit OK to save the adjustment.
   

For more information about the steps above, you can refer to this article: Process Sales tax adjustment.

On the other hand, you can do a journal entry to post this to another account and I recommend consulting an accountant near you to keep your books accurate. You may find this thread handy, too, from the help given by one of our QuickBooks Community experts.

Anytime you can post a comment if you have additional questions about adjusting the sales tax amount due. I'll make sure to help you out. Enjoy the rest of the day!