I want to declare my property title in Kolkata as the rightful owner what suit to file

You can file a suit for declaration of title before the civil court in Kolkata seeking a declaration that you are the lawful owner of the property. The suit must include all persons claiming an interest in the property as defendants, and you must produce title deeds, mutation entries, and tax receipts as evidence. Under West Bengal Premises Tenancy Act 1997, the court in West Bengal will grant a declaration only if you are in possession of the property. If you are not in possession, you must file a suit for possession along with the declaration. If the declaration is disputed, you can appeal to the Calcutta High Court under West Bengal Premises Tenancy Act 1997 for appropriate relief.