The 2-year comparison is not sent to the IRS and is for your information only. You do not have to redo your taxes because of an error on that form. You will not be able to change your forms with Online TurboTax Self-Employed. You can change forms with the Home and Business Desktop version. But correcting the 2-year comparison is not going to affect your final return that is filed with the IRS.
The 2-year comparison form can be very helpful when you see changes in your numbers from the previous year and need to research them.
