Books of NT written after the assumption of Mary Assuming for the moment that the Assumption of Mary is a historical event (a statement with which certainly some Christians disagree), which books of the New Testament can be considered as written after the assumption of Mary?
All of them.  Jesus was 33 when he died.  If she were 12 - 20 years old at his birth, then she would have been 45 - 53 years old at his death.  Which is quite old for people at that time.  The earliest known books of the New Testament were written around 45-55 CE.  This would have her age between 57 - 75 year old - which would not be consistent with the average age of humans in the first century.  I am assuming year 0 for Jesus' birth.  However there are reasons to suspect that his birth was as early as 6BC which would make her that much older.

Furthermore, it would have been highly unlikely that at Mary's age and potential fame, would have survived the First Jewish-Roman War. Please consider reading this article which dates the assumption no later than 70 AD.