What if future tenant wants to cancel before move in date?

[Lucero Sanchez]

We made a rental agreement with our future tenant yesterday with move in date of June 15th she gave us the security deposit, first months rent and pet deposit yesterday. So my question is, what happens if in the event our tenant decides to cancel the contract? What percentage should we give her back? I hope this doesn't happen but I was just wondering and I'm sure it's good to know. Does anyone have any suggestions or has had this happen before?