If you have already submitted your return to the IRS, you will have to wait for them to either accept or reject your return. If your return has been accepted, you will have to file an amended return (Form 1040X) to make this change. However, if your return has been rejected or has not been submitted, you can follow the steps below:
To change the filing status in TurboTax Online, please follow the steps below:
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Log in to your TurboTax Online account, or open your TurboTax desktop program,
- Click to continue your return
- Click on Personal Info
- Find your filing status under your name
- Click to edit
You can follow this link to assist you in filing an amended return (if needed).
https://ttlc.intuit.com/questions/4252298