Generally, the first step in attempting to break a fixed-term tenancy (where nobody has violated the tenancy terms) would be to discuss the situation with the other party. If both parties consent to end the lease early, it can be terminated with a Termination Agreement.
If terminating a lease is not an option, subletting or assigning may be a good alternative for both parties.
To sublet a rental property, a tenant must create a Sublet Agreement and sign it with their landlord and the subtenant. The original tenant remains liable for the obligations stated in the original lease agreement.
Assigning a Tenancy Agreement means transferring lease interest to a new tenant. Unlike subletting, assigning means the original tenant gives away their rights and obligations to the new tenant. To assign a Tenancy Agreement, the parties use a Tenancy Assignment Agreement to outline the arrangement.