Why does Turbo Tax ask for the total of all my Traditional IRA accounts? I am under age 60 and not making withdrawals, so there should be no need for this information.

After entering the value of my total contributions to my Traditional IRA, Turbo Tax Deluxe, a version which does not contain retirement planning advice modules, asked me how much money is in all of my Traditional IRA accounts. That sounds like personal information which is not necessary to calculate an IRA deduction. Why is this question asked, and what are the consequences of providing an answer?