Choice "D" is correct. An incorporated exempt organization must comply with the code provisions regarding installment payments of estimated income tax by corporations.
Choice "b" is incorrect. An incorporated exempt organization must make estimated tax payments if its tax can be reasonably expected to be $500 or more, not $100.
Choice "c" is incorrect. An incorporated exempt organization must pay at least 90% of the tax due as shown on the prior year's return in quarterly estimated tax installments, with the balance due by the due date of the return.
Choice "a" is incorrect. No such deferral period exists for the payment of the tax.