If you have not yet filed your federal return, you should include your current mailing address on your return (i.e., the April 1st address, current as of when the IRS receives your return) - you always want to provide the IRS with the mailing address where they can best reach you, should the IRS need to send you correspondence.
For your information, should you change your mailing address again, you can use Form 8822, Change of Address, to report your new mailing address to the IRS.
Please see the following TurboTax FAQ, "How do I change my address with the IRS?":
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