Perjury in dv

It's not perjury but forgery.

Prosecuting her will help you very much.

Hope this is your query:  Now case is for final arguments as I have closed my evidence

Any material evidence can be submittted to Court even after such closing of evidence, with permission of court, before such decision.

You can seek re examination of the witness and cross examine her confronting her with the facts (Discovery of concealed document by the parties to the suit)

Get that information under RTI in larger public interest under Life or Liberty clause from her employer and file the same with the help of your advocate.