Since the amended tax return cannot be e-filed, about three weeks after you mailed the federal amended tax return, Form 1040X, the status of the amended return should be available on this IRS website - <a rel="nofollow" target="_blank" href="https://www.irs.gov/filing/wheres-my-amended-return">https://www.irs.gov/filing/wheres-my-amended-return</a>