Landlord options for Tenant Breaking a Lease

[Raj Vajir]

Would anyone be able to help on what my options are if a tenant breaks a lease.  I have 3 people on the lease and one of them just walked out (daughter's boyfriend) and now the Mom and the daughter's salaries does not cover the rent and they want to end the lease in 15 days.  What options (steps) do I have?  Can I keep the deposit money?  Where do I file to reflect the broken lease.  Is the legal process pretty lengthy/expensive?  I am willing to just keep the deposit and get new renters in there.

Thank you in advance for your response.

Raj