If you have already filed, you will not have a chance to fix the return. If it is rejected by the IRS however, you will be able to fixed what you 'messed up' on. However, if you have not yet filed, the only way to fix your return is to clear and start over. This will give you a chance to choose
the product you want or start with the basic and upgrade if you need to.
Please see the TurboTax FAQ below to get started.
https://ttlc.intuit.com/replies/3288495
