When anyone selects file by mail for any tax return.
They have to mail it all in themselves....At the Post Office and use a Tracking method at the PO Service Counter....signed-dated, and including any forms that show tax withholding on them (W-2...1099-R etc)
Federal forms go to the IRS...State forms go to the respective State Dept of Revenue..
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DO not select File by Mail unless absolutely necessary.