When you complete the advanced child tax credit information under Deductions & Credits in TurboTax you should split the full amount received and enter half for each spouse. This will provide the accurate results for your return. Do not duplicate the amount by entering the full amount for each of you.
Federal>Deductions and Credits>You and Your Family>Child Tax Credit
The IRS is sending out letter 6419 to you. It will show the amount of advance child tax credit that you received during 2021. Enter the information from that letter carefully. The remaining amount of CTC that you can receive will show up on line 28 of your 2021 Form 1040.
PREVIEW 1040
https://ttlc.intuit.com/questions/1901539-how-do-i-preview-my-turbotax-online-return-before-filing
Click on Tax Tools on the left side of the screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.
NOTE: The CTC is indeed a “credit” that can be applied toward any tax liability that you would otherwise have to pay as “tax due” to the IRS.