Thanks for taking the time to reached out to us. Let me help provide some insights about clearing the tax notifications in QuickBooks Online (QBO).
The tax notifications will show in QBO if you have transactions that need your attention such as payroll tax forms, payroll tax payments, etc..
To remove your outstanding payroll forms and taxes, you'll need to file and pay them. However, if you've already paid a tax outside, you'll have to record all tax payments as paid to close the tax notification. To do this, let's enter prior tax payments in QuickBooks.
Go to Taxes & Forms.
Click Enter Prior Tax History.
In the Prior Tax Payments screen, click Add Payment.
In the Add Payment screen, complete the following tax payment details.
Click OK to return to the Prior Tax Payments report screen.