Can somone help me understand my deductions on my checks?

Are taxes calculated before or after deductions? I'm curious how come my taxes stayed the same amount on the two highlighted when I'm deductions went up (I added life insurance so deductions went up by 23 bucks) wouldn't that change my tax amount ? I'm salaried by the way not sure if it matters. These are by weekly payments

sorry deductions include

401k

health Insurance

Life insurance

total up the $266.59