What do you mean "second Enhanced Deduction...."? On a Joint return if both spouses are 65 or older you automatically get 6,000 for each person. So that would be 12,000 on 1040 line 13b. It is automatic depending on your birthdate. Or if you have a high income it will be reduced. Double check you are filing Joint and check the birthdates.
For Joint the deductions starts to phase out at 150,000 and maxes out at 250,000
