After you file

It's too late to file for a refund from 2011 but if you need to file one you can get the forms here,

1040  <a rel="nofollow" target="_blank" href="http://www.irs.gov/pub/irs-prior/f1040--2011.pdf">http://www.irs.gov/pub/irs-prior/f1040--2011.pdf</... <a rel="nofollow" target="_blank" href="http://www.irs.gov/pub/irs-prior/i1040--2011.pdf">http://www.irs.gov/pub/irs-prior/i1040--2011.pdf</...

1040A  <a rel="nofollow" target="_blank" href="http://www.irs.gov/pub/irs-prior/f1040a--2011.pdf">http://www.irs.gov/pub/irs-prior/f1040a--2011.pdf... <a rel="nofollow" target="_blank" href="http://www.irs.gov/pub/irs-prior/i1040a--2011.pdf">http://www.irs.gov/pub/irs-prior/i1040a--2011.pdf...

1040EZ  <a rel="nofollow" target="_blank" href="http://www.irs.gov/pub/irs-prior/f1040ez--2011.pdf">http://www.irs.gov/pub/irs-prior/f1040ez--2011.p...> Instructions <a rel="nofollow" target="_blank" href="http://www.irs.gov/pub/irs-prior/i1040ez--2011.pdf">http://www.irs.gov/pub/irs-prior/i1040ez--2011.p...>

2011 Tax Tables <a rel="nofollow" target="_blank" href="http://www.irs.gov/pub/irs-prior/i1040tt--2011.pdf">http://www.irs.gov/pub/irs-prior/i1040tt--2011.p...>
Publication 17 Tax Guide for 2011 <a rel="nofollow" target="_blank" href="http://www.irs.gov/pub/irs-prior/p17--2011.pdf">http://www.irs.gov/pub/irs-prior/p17--2011.pdf</a>