Virginia 2021 Form 760PY tax calculation

I don't believe Line 17 is calculating correctly on the 2021 Virginia Form 760PY.  Line 16 (Virginia taxable income) on my Form is just over $3,200.  According to the tax table in the 2021 Form 760PY instructions, the tax should be $66 or $67, but my Form says $0.  The final review of the return indicates no errors.  Am I missing something, or does the software need a fix?