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First, you are not required to complete the 2013 estimated tax information.
This is simply a option available if you want to generate the 1040es forms for 2013. This form is used to mail estimated tax payments.
As for the elective deferral, it is just that, an election.
If you claimed the entire amount, you did not make the election possibly.
If you received a 1099r tbis year, you need to file an amended return 1040x for last year then claim the proper portion on this year.
If you did not receive a 1099r for 2012, you did not make the election and you don't need to do anything. You are allowed to claim it in one year as you did. Since you claimed everything last year, you need not claim any amount this year.