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There could be several reasons why your function is returning an empty list. Here are some possible reasons:

1. No elements are added to the list: Check if your code is actually adding elements to the list. If not, it will always return an empty list.

2. Scope of the list: Make sure that the list is defined in a scope that allows the function to access it. If the list is defined inside the function, it will be recreated every time the function is called, resulting in an empty list.

3. Incorrect conditional statements: If you are using conditional statements to add elements to the list, make sure that the conditions are correct. If the conditions are not satisfied, no elements will be added to the list.

4. Incorrect syntax: Check for syntax errors, such as missing or extra parentheses, brackets, or quotation marks, as these can cause the function to fail to add elements to the list.

5. Incorrect return statement: Check that your function is returning the list correctly. If you are returning a variable that is not a list or returning the list from within a loop, the function may not return the expected list.