Please contact customer service 562-322-3221 in the state of California or 800-999-7845 out of state.You may also email at [email protected] with for more information on returning an item for credit, repair, or exchange. We have a 25% restocking fee on all items returned (NOTE: electronic parts and used tape are non-returnable unless approved so)- freight is also not included. We recommend contacting us for a tape sample mailed for testing on your product end use prior purchasing if you are not familiar with our products. Electronic machine parts are non-returnable but you may send most parts in for testing and repair. Thank you.