Usually not. Under Connecticut law, employers may only deduct money from an employee’s wages if:
– the deduction is authorized by state or federal law or
– the employer has written permission from the labor commissioner or
– the employee authorized the deduction and it is for medical purposes with no financial gain to the employer.
There are of course some things the employer may deduct for, such as taxes and unpaid child support (these are authorized by law).
Things an employer may not deduct for (probably) include mistakes (e.g., money is accidentally missing from your till at the end of your shift).