I know tax notices are really important and need urgent attention. Let me route you to the team that can help you with this.
We'll need help from our Payroll team to check why you're receiving such notice. They have the tools to check your records to understand why the IRS found out that your tax is underpaid. Please contact them on Monday from 6 AM to 6 PM PT. The steps can be found in this article: Contact Payroll Support.
The team may ask you to send a copy of the notice to us. You can do that by following the steps in this article: What to do if you receive a tax notice. Go to Step 3: Contact Intuit.