Why can’t I change my state taxes to the correct amount ?

No one in the forum can see your screen, your tax return or your account.  We do not know what you mean by "change my state taxes to the right amount"  What are you trying to do?

line 18 on  state taxes shows 114.00 but should be57.00

my W2 form shows 57.00 taxes not  114.00 as shown on return

If you believe that your W-2 is in error, you should contact your employer to have a corrected form issued.

See this help.