Only if it looks like you have stopped paying the rent and moved out without telling the landlord (called “abandoning” the rental), or a sheriff has executed a court order (called a Writ of Restitution) to evict you.
The landlord cannot change locks, add locks, or keep you from entering the place in any other way. It does not matter if you are behind in rent, utilities, or other fees.
*Call the clerk of your local Superior Court. Make sure the landlord did not file an eviction lawsuit against you. If the landlord did, and you believe the landlord did not serve you with the lawsuit papers, get legal help right away.
If the landlord locks you out, you can take the landlord to court. If you show the lockout was illegal, the court should order the landlord to pay you. How do I Sue in Small Claims Court? may help, depending on how much your claim is.
*You cannot file a Small Claims case to get a court order allowing you back into the place. See a lawyer.