I have sent my federal tax return by mail but the postal service lost track of it. Can I send another tax return? Any issue if the IRS receives 2 identical tax returns?

[bostonryan]

Tax return is mailed from abroad, was not possible to efile

[WillK]

No there is not an issue if they receive two returns, the will reject the second one. It is always recommended that you mail your return with certified postage so you can track it. Mail another return is as soon as you can.