I’ve already printed my taxes to mail them in, but haven’t sent them. We accidentally put our state tax to be used for estimated taxes 2018 but need to change it???

You can get back into your completed taxes since you have not submitted them to the IRS yet.

Sign in to your account

click My Taxes

click Add State

The "Add a State" is a backdoor way of getting into a completed tax return.  You will not be adding a state.  Once you are back in you can click the federal taxes tab or personal information tab.  Just navigate to wherever you need to make your change.