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I have some ideas to make sure you can handle your sales taxes in QuickBooks Online (QBO), @jwachtl.
First, let's check the sales tax set up to ensure they're correct. You can do this by going to the Taxes page.
Second, if you're seeing this amount on your invoices or sales receipts, you can click the See the math link (if you have Automated sales tax) to see its the breakdown.
Third, the accounting method (cash or accrual) can affect how QBO reports your sales tax. For more insights, please review this article: How cash and accrual accounting affect sales tax.
If all of them are correct and you're sales tax is still showing as doubled, I recommend contacting our support team. This way, they can check your account securely and perform a viewing session to review this further.
To achieve this, you can refer to this article: Contact QuickBooks Online Support. It also contains the support hours on when they're available to assist you.
To view and ensure all your sales tax is correct, you can pull up the Sales tax Liability report. When you're ready, you can begin filing your sales tax return and recording your tax payment to stay organized and compliant.
I've got your back if you have more questions about managing your sales taxes in QBO. I'd be glad to hear more from you in the comment section. Take care.