This is not a good thing. You do not want the IRS to complete a tax return for you. You want to complete your own tax return.
When the IRS completes a return for you, they won't include ANY expenses.
They may or may not include all of your dependents. You loose out on much needed legal deductions. And it is legal for the IRS to do this.
So, file your own past due returns to get the best results