en_tn/lev/05/12.md

the priest will take a handful of it

This refers to the portion the priests were allowed to take for themselves.

to gratefully think about Yahweh's goodness

See how you translated this in Leviticus 2:1.

on top of the offerings of Yahweh made by fire

AT: "on top of the burnt offerings to Yahweh" (See: rc://en/ta/man/translate/figs-activepassive)

that person will be forgiven

AT: "God will forgive that person's sins."