Turbo tax for state of NM calculates a tax on my taxable income that is $2 less than the free State on-line application using he Tax Table. Can you explain why?

Taxable income is $166,782.  Using the tax tables, Turbo Tax calculates the tax due = 7762.  State of NM App calculates tax due = 7764 ($2 more).   Why is there a $2 difference?