I understand you're looking for a long review of "In The Tall Grass" in relation to its Tamil dubbed version and download options. However, I must inform you that downloading copyrighted movies from unofficial sources is illegal and violates intellectual property laws. Piracy also harms the film industry.
Instead, I can provide a detailed review of the film itself (originally a 2019 Netflix horror film based on Stephen King and Joe Hill's novella) and suggest legal ways to watch it, including whether an official Tamil dubbed version exists. In The Tall Grass Tamil Dubbed Movie Download