When you are in the iMob Online Home tab you can find Bank right under Properties and above Emergency Room. Once you are in the iMob Online Bank you will find two text prompts. The top one is where you enter the amount you would like to deposit, and the bottom one is where you enter the amount you would like to withdraw.
When you first open up the iMob Online Bank you will notice that your entire available amount of money will be in the text prompt, so you should change this if you do not want to deposit all of your money. There will be a fifteen percent fee taken out of all deposits into the iMob Online Bank, and withdrawals are free.