Government obligation from (ETF) BIL dividend doesn't lower MA state tax

Hi

i bought ETF BIL in year 2024,

it pays dividend from short-term us treasury bond.

in theory these dividend are ~98% government obligation, should be exempted from MA taxes.

 

1. in TurboTax home&business 2024,
    PERSONAL -> Personal Income -> Interest and Dividends -> Dividends on 1099-DIV -> Update

2. in the 1099-DIV page
     Dividends and gains -> Box 1a -> $11548.18

3. Click "Continue"

     check "A portion of these dividends is U.S. Government interest"

4. Click "Continue"

     "U.S.Government interest", type in $5000 for testing 

5. Click "Continue", "Confirm" ...

 

Surprisingly, i do not see my MA Tax Due goes down, still $2000 due.

 

In step 2,  if i type in $1 just as a test, i can see more Federal Refund which make sense. But the MA Tax Due doesn't change, still $2000 due. 

$11548 is a big amount, with 5% MA tax, shouldn't i see the MA tax due change ?

 

So my question is, if the dividend from BIL is MA tax exempted as it claimed, am i doing something wrong in my steps ?