Understanding Deemed Income in Taxation Law

Main problem with textbooks is they make 'deemed income' sound super complex but trust me, it's easier than what they make it out to be. So, can someone give me a real-life example or definition of deemed income in Taxation Law which is easy to understand? I mean, my notes say it's income which is taxed as such, regardless of actual receipt, but I want something concrete. Like, can someone explain it using XYZ Ltd or ABC Pvt Ltd scenario, something which makes sense? Or maybe there's a real case which can help me understand it better?