I suggest resetting this step and trying again. Don’t change any of the code in the caesar function. Then simply assign your caesar function call with the arguments provided (careful with capitalization!) to an encrypted_text variable. Since this variable is outside of the function, it is a global variable and there should be no indentation.
It is great that you solved the challenge, but instead of posting your full working solution, it is best to stay focused on answering the original poster’s question(s) and help guide them with hints and suggestions to solve their own issues with the challenge. How to Help Someone with Their Code Using the Socratic Method
We are trying to cut back on the number of spoiler solutions found on the forum and instead focus on helping other campers with their questions and definitely not posting full working solutions.