You can add a prior year return at anytime from within your Tax Center.
Select the blue button that says "Add a Prior Year Return". (This feature is available to Prior Year Return(s) within our system. Returns constructed through a different provider can not be added)
Prior Year Returns that have been added will be listed in this section of the 1040 Tax Center.
When there has not been a Prior Year Return added. You will see "No prior year returns were found".
Select the applicable year of the Tax Return.
Enter your SSN, Last Name, and Password Used For This Return.
Next, Select "Add Return".