If you're looking for a Telugu PDF version of the Narayana Bali ritual, you can try searching online for the following resources:
The Kanchi and Sringeri Mutts publish authentic Shakha-specific PDFs. Their Telugu version is considered the gold standard for Smartha Brahmins. narayana bali telugu pdf
The priest begins by taking the details of the performer (name, gotra, rashi) and the departed soul. A Sankalpa is made stating that this ritual is being performed to liberate the specific soul from earthly attachments. If you're looking for a Telugu PDF version