Hindu rituals after death, including Vedic rituals after death, are ceremonial rituals in Hinduism, one of the samskaras (rite of passage) based on Vedas and other Hindu texts, performed after the death of a human being for their moksha and consequent ascendance to Svarga(heaven). Some of these vary across the spectrum of Hindu society.
People go to sacred places like Kashi (Varanasi), Haridwar, Prayagraj(Allahabad), Srirangam, Brahmaputra and Rameswaram to complete the rite of immersion of ashes into the water
https://en.wikipedia.org/wiki/Tarpana sacred ritual whereupon the closest relatives make a sacred offering to deities so that the departed soul may enter Svarga. In Hindu mythology, Parashuramaoffered a tarpana for his father Jamadagni with the blood of his father's killer.
Tarpana is usually performed at a holy site such as ghats on sacred rivers or sites.
https://en.wikipedia.org/wiki/Indian_rituals_after_death
Post death brahmin ritual
The death ritual does not end with the elimination of the body. There is still the safety of the soul to look after. To ensure the passage during its voyage to the Otherworld, an eleven-day ritual called shraddha is performed. It “consist(s) of daily offerings of rice balls, called pindas, which provide a symbolic, transitional body for the dead. During these days, the dead person makes the journey to the heavens, or the world of the ancestors, or the ‘far shore.'”On the twelfth day, the departed soul is said to reach its destination and be joined with its ancestors, a fact expressed symbolically by joining a small pinda to a much larger one” . Without these rites, the soul may never find it way to Yama’s realm”
https://espiritokashi.org/2011/10/25/complete-post-death-rituals-in-a-brahmin-family/