Pamdory, thank you for your response.

Of the 9 so far, only one or two might apply to the stimulus checks - Non Filers Dependents. All others are either Single or Married Filing Jointly with no dependents and filed a previous year (2019) tax return that was electronically accepted. The Diagnostic is referring to the Primary Taxpayer's social security number as being already filed. But I will check with our clients whose children are of college age to see if they filed online, or if the parents filed on their behalf for the Stimulus payments.

Again, thanks!