noun, noun or participle which takes 'suru'
re-enter; re-type
Used for entering data again, typically in computing or form-filling contexts.
パスワードを再入力してください。
Please re-enter your password.
間違えたので、データを再入力した。
I made a mistake, so I re-entered the data.
入力 means 'input' or 'enter' for the first time; 再入力 specifically means doing it again.
Compound of 再 (re-) and 入力 (input).