You should have an amend button

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If you want to make changes or add a document to a tax return that has already been submitted, you should follow these guidelines. 

• You must first wait until the initial return is completely processed. 
• You will have to use the same TurboTax account that you used for the original tax return. 
• Once you begin your amendment, you'll see your original return.  
• The refund calculator will start new at $0 and only reflect the changes in the refund or tax due 
• Only make changes to the areas of your return that need amending. 
• You have three years from the date you filed your return or two years after you paid the tax due (whichever is later) to file an amendment 

Select your product below and follow the instructions. 

Amend TurboTax Online 

Amend TurboTax CD/Download 

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If you are using the TurboTax desktop editions -

Click on Federal Taxes (Personal using Home & Business)

Click on Other Tax Situations

Under Other Tax Forms

On Amend a return, click on the start button