Sentence: Please submit your income tax returns form, if not submitted.

[Daemon99]

Please submit your income tax returns form, if not submitted.

Does the above line sound natural? Please suggest better ways of putting it.
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Non-native speaker of English
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I intend to live forever - so far, so good.

[Kitosdad]

Please submit your income tax returns form, if not already submitted.

If not already submitted, please submit your income tax returns form.

Morning Daemon.

Bill.
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Keep it simple ... Keep it interesting.

[Isonaxjainvab]

jdi inget prancis zaman2 platini dlu yg ad ‘fantastic four’

[Daemon99]

Thanks a lot, Bill!
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Non-native speaker of English
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I intend to live forever - so far, so good.