Turbo tax computed a negative taxable income for Virgina state and no tax due. Is this correct and does he even need to file?

[helene]

His total income was low, and he is still our dependent. 

[Rachel_W · Accepted solution]

No, your son does not need to file if there is no tax due or refund.  

As your Dependent, your son would not need to file a VA Tax Return unless his income exceeds $3,930.  However, he would want to file a VA Return if he had VA taxes withheld so that he could get them refunded.