If you are using the TurboTax online editions and want to see the difference based on the Filing Status, you will need to create a new account for the MFS.
Actually two more accounts if both of you are reporting income. One MFS account for you and one MFS account for your spouse. For the new account you will also need to create a new User ID and add a new email address.
Leave your original account as MFJ.
Go to this website and click on Sign up to create a new account - https://turbotax.intuit.com/personal-taxes/online/file-your-own-taxes/
