If your parent's and/or sibling's return(s) haven't been completed by the time you need to file your tax return, you can request an
extension and enter their information once you have it.
If you determine that you can't get this information, you can request the information from the IRS after April 15, 2026. You'll need to send a signed, written request for the information to the Internal Revenue Service Center where your parent's and/or sibling's return is filed. To determine the correct address to send your request to, you can contact your
local IRS office .