IRS tax forms and instructions most relevant to U.S. taxpayers/expats:
Form: http://www.irs.gov/pub/irs-pdf/f1040.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i1040.pdf
Form: http://www.irs.gov/pub/irs-pdf/f1040sa.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i1040sca.pdf
Form: http://www.irs.gov/pub/irs-pdf/f1040sb.pdf
Form: http://www.irs.gov/pub/irs-pdf/f1040sc.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i1040sc.pdf
Form: http://www.irs.gov/pub/irs-pdf/f1040sd.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i1040sd.pdf
Form: http://www.irs.gov/pub/irs-pdf/f1040se.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i1040se.pdf
Form: http://www.irs.gov/pub/irs-pdf/f1040sse.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i1040sse.pdf
Form: http://www.irs.gov/pub/irs-pdf/f1040sei.pdf
Form: http://www.irs.gov/pub/irs-pdf/f2441.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i2441.pdf
Form: http://www.irs.gov/pub/irs-pdf/f8821.pdf
Form: http://www.irs.gov/pub/irs-pdf/f8863.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i8863.pdf
Form: http://www.irs.gov/pub/irs-pdf/f1116.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i1116.pdf
Form: http://www.irs.gov/pub/irs-pdf/f2555.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i2555.pdf
Form: http://www.irs.gov/pub/irs-pdf/f3520.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i3520.pdf
Form: http://www.irs.gov/pub/irs-pdf/f3520a.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i3520a.pdf
Form: http://www.irs.gov/pub/irs-pdf/f5471.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i5471.pdf
Form: http://www.irs.gov/pub/irs-pdf/f5472.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i5472.pdf
Form: http://www.irs.gov/pub/irs-pdf/f8858.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i8858.pdf
Form: http://www.irs.gov/pub/irs-pdf/f8865.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i8865.pdf
Form: http://www.irs.gov/pub/irs access/f8621_accessible.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i8621.pdf
Form: http://www.irs.gov/pub/irs-pdf/f926.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i926.pdf
Form: http://www.irs.gov/pub/irs-pdf/f8833.pdf
Form: http://www.irs.gov/pub/irs-pdf/f8854.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i8854.pdf
Form: http://www.irs.gov/pub/irs-pdf/f8891.pdf
Form: http://www.irs.gov/pub/irs-pdf/f8938.pdf
Instructions: http://www.irs.gov/pub/irs-pdf/i8938.pdf
Form: http://www.fincen.gov/forms/files/f9022-1_fbar.pdf
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