I swear I have it done correctly, but the autograder says it's wrong. It says it doesn't do everything it is supposed to.
Check the instructions again - VERY CAREFULLY.
The most common error is failing to notice the bold, red part of the statement below:
Whether they want to make a deposit or withdrawal
For this step, they should type deposit or withdrawal, depending on what they want to do. It needs to be the exact spelling, including capitalization!