After you file
After reviewing the 1040 again, may have discovered something.
In the attached image, Standard Deduction, Someone can Claim: the box is checked ☑️ Your Spouse as a dependent.
Could this have caused the Notice. 
After reviewing the 1040 again, may have discovered something.
In the attached image, Standard Deduction, Someone can Claim: the box is checked ☑️ Your Spouse as a dependent.
Could this have caused the Notice.