If $6,000 of taxable distribution is all that your client had, the VAGI would be lower than the filing thresholds for VA return.  That's why no tax would be computed even though the return is generated.

YOU DO NOT HAVE TO FILE IF YOU ARE:
Single and your VAGI is less than ..................$11,950
Married filing with your spouse
on the same return and your
combined VAGI is less than............................$23,900
Married filing separately (on separate
forms) and your VAGI is less than..................$11,950