If you have not yet e-filed, you can just go to MY INFO and change your address.
OR----
Do you mean you e-filed your tax return with a wrong or old address? You have to mail in a change of address to the IRS. No one at TurboTax can fix that for you.
CHANGE OF ADDRESS
https://www.irs.gov/faqs/irs-procedures/address-changes/address-changes
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