Do you have more than 1 W2? CA SDI is in either box 14 or 19. If it is in box 19 then move it to box 14. How much is it? The max is 1% of your wages up to $1,149.67. How much is it over? Try leaving off the cents. If it's giving you line 74 for excess then you entered more than 1 W2.
