Contact your local labor commissioner and they will help you for free
Kevin A. Spainhour, Esq. - Hopefully this information is helpful. My answering this question giving my general thoughts does not create an attorney/client relationship and is not a legal opinion. The only way to create an attorney client relationship is to retain our services and that can be done over the phone, email or in person.
The Labor Commissioner’s Office, also known as the Division of Labor Standards Enforcement (DLSE), was established to adjudicate wage claims, investigate discrimination and public works complaints, and enforce Labor Code statutes and Industrial Welfare Commission orders. You should find the office near you (link below) and ask for assistance. They will provide you with the forms and information on how to file your complaint.
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This response is intended to be a general statement of law, should not be relied upon as legal advice, does not create an attorney/client relationship and does not create a right to continuing email exchanges.
You want to file a wage claim with the DLSE. See here: http://www.dir.ca.gov/dlse/howtofilewageclaim.htm
This answer is a general interpretation of the law and is not fact specific to your case. Likewise it does not create an attorney-client relationship. You should seek an attorney for a review of your specific facts and documents.
It is unlawful for an employer to deduct from a final paycheck for charges other than usual taxes, etc. unless you provided written authorization for the deductions. In addition, if you were fired or laid off (lack of work), or quit with at least 72 hours' notice, your final check, including all earned and unused vacation or PTO (not sick leave) must be provided to you on your last day. If you quit and did not give at least 72 hours' notice, your employer has 72 hours to provide your final paycheck to you. If your check was late or if there are unauthorized deductions causing you to not be timely paid in full, you are owed the unpaid wages PLUS one day's pay for each day you have to wait to be paid - up to 30 days maximum and the law states that your employer "shall" pay your attorneys' fees. You can file a claim with the Labor Commissioner and represent yourself for free (or pay to have an attorney represent you) or the better idea is to retain legal counsel to write a demand letter to your former employer setting forth your claim, the violations of the law and the statute/written law that states that the employer "shall" pay your attorneys' fees. Representation by your attorney instead of the Labor Commissioner usually gets results faster. Call an employment law attorney to discuss. Many of us offer a free initial phone consultation and may be able to help you at no cost to you.
You should contact a qualified attorney before filing a claim by yourself. There are myriad considerations to review before you take this on by yourself. Get an attorney who has experience in this area of employment law. Good luck.