You did not specify exactly which form you used.
If you used the form mentioned above, <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-pdf/i1040a.pdf">https://www.irs.gov/pub/irs-pdf/i1040a.pdf</a>, be sure to read the exception on page 29, and the "Before You Begin" instructions on the top of page 30.
