The film screened at the Melbourne International Film Festival in 1989, and it is listed at the MIFF site here, with a short synopsis explaining why it was screened (typos have been corrected):
(Note: this listing contains spoilers).
The pitch on the Roadshow DVD release:
The Year My Voice Broke is set in the summer of 1962 in a remote New South Wales country town. Adopted as a baby, sixte...
The film won prizes at both the Melbourne International and Sydney Film Festivals in 1989, and MIFF described the film this way here:
In the fine Australian tradition of Love Letters From Teralba Roa...