If you used the desktop version of Turbo Tax, last year, and did not have a back up or paper copy of your return, you may still obtain that information from the IRS in a transcript. If you can process with the secure access eauthentication, you can view it online or you can request a written transcript.
Here is a link to the IRS page with information on transcripts to help with your efile.
click here for irs.gov transcript information
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