If you want to file a complaint with regard to forgery committed by someone, then you have to file the complaint with the police station concerned which can then register the FIR. If the police is not registering FIR or not taking any action on the basis of your complaint, you have the option to file a complaint before the Magistrate under Section 156(3) of the Criminal Procedure Code seeking direction to police to investigate the matter. Else, you can file a private complaint with the Magistrate under Section 190 of the Cr.P.C. wherein you have to prove the case instead of the police doing it.
With regard to your other request, I may point out that, as mentioned in our Forum guidelines, on this Forum we do not go into detailed facts of an individual case (which requires study of detailed facts / documents of a case). For this, you may engage some local lawyer and show him all your relevant papers.
Dr. Ashok Dhamija is a New Delhi based Supreme Court Advocate and author of law books. Read more about him by clicking here. List of his Forum Replies. List of his other articles. List of his Quora Answers. List of his YouTube Videos.