If you haven't filed your return yet, then you can change this in TurboTax Online:
- Open TurboTax Online
- Select Tax Home in the left pane
- On the Hi, let's keep working on your taxes! screen, select the dropdown on the right side of the Personal Info box, then select Continue
- On the Personal info summary screen, select Edit to the right of your daughter's name
- Answer appropriately on the What is [your daughter's] relationship to you? screen, then select Continue
- Change your daughter's information in the Date of birth box, then select Continue
- Enter any appropriate information on the following screens
If you've already filed your return, you can't edit this information. However, the IRS will have your daughter's information in its database.