State tax filing

I did take a special bonus deduction on the Federal return and there was an adjustment on the Mass State Return for the what is allowed for Mass. vs Federal.  My question really is regarding how the State (Mass.) calculated the depreciation this year (2021).  It does not seem correct.  State Depr. for 2020 (3 months) was $2,731 and for 2021 Turbo Tax is calculating it as $5,100 (for 12 months).   This does not make sense to me, unless I am missing something.  I would think the depreciation would be around $10k for the State for the 12 months.