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Open Tax Solver

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OTS is an easy-to-use text-based C-program for calculating Tax Form entries and tax-owed or refund-due, for Federal or State personal income taxes. Includes versions for US 1040, Scheds A, B, C, D, L, and forms for several states.

You can download file releases of Open Tax Solver project from List of release files

System Requirements

Operating System: OS Portable (Source code to work with many OS platforms)

List of release files

File/Folder NameFile TypeSizeDateDownload Count
Latest 5 files
OpenTaxSolver2012_10.00.tgzapplication/x-gzip; charset=binary469.6 KB2013-04-09 15:250
OpenTaxSolver2012_10.00.zipapplication/zip; charset=binary707.4 KB2013-04-09 14:130
OpenTaxSolver2011_9.02_macosx.tgzapplication/x-gzip; charset=binary496.9 KB2012-04-08 01:100
OpenTaxSolver2011_9.02.zipapplication/zip; charset=binary630.7 KB2012-04-08 01:100
OpenTaxSolver2011_9.02.tgzapplication/x-gzip; charset=binary490.8 KB2012-04-08 01:091
All Files
OTS_2012
v10.00
OpenTaxSolver2012_10.00.tgzapplication/x-gzip; charset=binary469.6 KB2013-04-09 15:250
v10.00_mswin
OpenTaxSolver2012_10.00.zipapplication/zip; charset=binary707.4 KB2013-04-09 14:130
OTS_2011
v9.02_MacOSx
OpenTaxSolver2011_9.02_macosx.tgzapplication/x-gzip; charset=binary496.9 KB2012-04-08 01:100
v9.02_mswin
OpenTaxSolver2011_9.02.zipapplication/zip; charset=binary630.7 KB2012-04-08 01:100
v9.02
OpenTaxSolver2011_9.02.tgzapplication/x-gzip; charset=binary490.8 KB2012-04-08 01:091
v9.01_MacOSx
OpenTaxSolver2011_9.01_macosx.tgzapplication/x-gzip; charset=binary497.4 KB2012-02-25 00:460
v9.01_mswin
OpenTaxSolver2011_9.01.zipapplication/zip; charset=binary630.5 KB2012-02-25 00:460
v9.01
OpenTaxSolver2011_9.01.tgzapplication/x-gzip; charset=binary490.5 KB2012-02-25 00:460
v9.00_MacOSx
OpenTaxSolver2011_9.00_macosx.tgzapplication/x-gzip; charset=binary494.8 KB2012-01-14 12:080
v9.00_mswin
OpenTaxSolver2011_9.00.zipapplication/zip; charset=binary626.7 KB2012-01-14 12:080
v9.00
OpenTaxSolver2011_9.00.tgzapplication/x-gzip; charset=binary487.9 KB2012-01-14 12:080
OTS_2010
v8.07_MacOSx
OpenTaxSolver2010_8.07_macosx.tgzapplication/x-gzip; charset=binary436.4 KB2012-01-08 12:210
v8.07_mswin
OpenTaxSolver2010_8.07.zipapplication/zip; charset=binary555.6 KB2012-01-08 12:210
v8.07
OpenTaxSolver2010_8.07.tgzapplication/x-gzip; charset=binary432.5 KB2012-01-08 12:201
v8.05_MacOSx
OpenTaxSolver2010_8.05_macosx.tgzapplication/x-gzip; charset=binary434.5 KB2011-03-29 07:270
v8.05_mswin
OpenTaxSolver2010_8.05.zipapplication/zip; charset=binary555.0 KB2011-03-29 07:270
v8.05
OpenTaxSolver2010_8.05.tgzapplication/x-gzip; charset=binary431.8 KB2011-03-29 07:260
v8.04_MacOSx
OpenTaxSolver2010_8.04_macosx.tgzapplication/x-gzip; charset=binary434.1 KB2011-03-22 04:290
v8.04_mswin
OpenTaxSolver2010_8.04.zipapplication/zip; charset=binary554.5 KB2011-03-22 04:290
v8.04
OpenTaxSolver2010_8.04.tgzapplication/x-gzip; charset=binary431.4 KB2011-03-22 04:280
v8.03
OpenTaxSolver2010_8.03.tgzapplication/x-gzip; charset=binary429.7 KB2011-02-11 06:470
v8.03_MacOSx
OpenTaxSolver2010_8.03_macosx.tgzapplication/x-gzip; charset=binary432.4 KB2011-02-11 06:440
v8.03_mswin
OpenTaxSolver2010_8.03.zipapplication/zip; charset=binary552.9 KB2011-02-11 06:410
v8.02
OpenTaxSolver2010_8.02.tgzapplication/x-gzip; charset=binary429.6 KB2011-02-02 03:371
v8.02_MacOSx
OpenTaxSolver2010_8.02_macosx.tgzapplication/x-gzip; charset=binary432.2 KB2011-02-02 03:310
v8.02_mswin
OpenTaxSolver2010_8.02.zipapplication/zip; charset=binary552.8 KB2011-02-02 03:310
v8.01
OpenTaxSolver2010_8.01.tgzapplication/x-gzip; charset=binary407.6 KB2011-01-18 03:290
v8.01_MacOSx
OpenTaxSolver2010_8.01_macosx.tgzapplication/x-gzip; charset=binary410.2 KB2011-01-18 03:280
v8.01_mswin
OpenTaxSolver2010_8.01.zipapplication/zip; charset=binary514.3 KB2011-01-18 03:280
v8.00
OpenTaxSolver2010_8.00.tgzapplication/x-gzip; charset=binary370.6 KB2011-01-11 00:460
v8.00_MacOSx
OpenTaxSolver2010_8.00_macosx.tgzapplication/x-gzip; charset=binary375.0 KB2011-01-11 00:450
v8.00_mswin
OpenTaxSolver2010_8.00.zipapplication/zip; charset=binary449.1 KB2011-01-11 00:450
Payroll_Deduct_Calc
payroll_deduction_calc_linux
payroll_deduction_calc_linux.tgzapplication/x-gzip; charset=binary74.5 KB2010-05-29 11:410
payroll_deduction_calc_macosx
payroll_deduction_calc_macosx.tgzapplication/x-gzip; charset=binary77.9 KB2010-05-29 11:380
payroll_deduction_calc_mswin
payroll_deduction_calc_mswin.zipapplication/zip; charset=binary104.7 KB2010-05-29 11:380
OTS_2009
v7.08
OpenTaxSolver2009_7.08.tgzapplication/x-gzip; charset=binary421.9 KB2010-04-15 14:040
v7.08_MacOSx
OpenTaxSolver2009_7.08_macosx.tgzapplication/x-gzip; charset=binary425.7 KB2010-04-15 14:010
v7.08_mswin
OpenTaxSolver2009_7.08.zipapplication/zip; charset=binary512.0 KB2010-04-15 14:010
v7.07
OpenTaxSolver2009_7.07.tgzapplication/x-gzip; charset=binary421.7 KB2010-03-30 02:350
v7.07_MacOSx
OpenTaxSolver2009_7.07_macosx.tgzapplication/x-gzip; charset=binary426.0 KB2010-03-30 02:350
v7.07_mswin
OpenTaxSolver2009_7.07.zipapplication/zip; charset=binary511.6 KB2010-03-30 02:350
v7.06
OpenTaxSolver2009_7.06.tgzapplication/x-gzip; charset=binary421.6 KB2010-03-20 03:520
v7.06_MacOSx
OpenTaxSolver2009_7.06_macosx.tgzapplication/x-gzip; charset=binary425.9 KB2010-03-20 03:510
v7.06_mswin
OpenTaxSolver2009_7.06.zipapplication/zip; charset=binary511.7 KB2010-03-20 03:510
v7.05
OpenTaxSolver2009_7.05.tgzapplication/x-gzip; charset=binary421.5 KB2010-03-09 08:580
v7.05_MacOSx
OpenTaxSolver2009_7.05_macosx.tgzapplication/x-gzip; charset=binary425.8 KB2010-03-09 08:570
v7.05_mswin
OpenTaxSolver2009_7.05.zipapplication/zip; charset=binary511.2 KB2010-03-09 08:570
v7.04
OpenTaxSolver2009_7.04.tgzapplication/x-gzip; charset=binary421.5 KB2010-03-03 12:000
v7.04_MacOSx
OpenTaxSolver2009_7.04_macosx.tgzapplication/x-gzip; charset=binary425.7 KB2010-03-03 12:000
v7.04_mswin
OpenTaxSolver2009_7.04.zipapplication/zip; charset=binary511.1 KB2010-03-03 12:000
v7.03
OpenTaxSolver2009_7.03.tgzapplication/x-gzip; charset=binary423.8 KB2010-02-02 11:100
v7.03_MacOSx
OpenTaxSolver2009_7.03_macosx.tgzapplication/x-gzip; charset=binary425.9 KB2010-02-02 11:100
v7.03_mswin
OpenTaxSolver2009_7.03.zipapplication/zip; charset=binary515.0 KB2010-02-02 11:100
v7.02
OpenTaxSolver2009_7.02.tgzapplication/x-gzip; charset=binary423.8 KB2010-02-02 01:370
v7.02_MacOSx
OpenTaxSolver2009_7.02_macosx.tgzapplication/x-gzip; charset=binary425.9 KB2010-02-02 01:370
v7.02_mswin
OpenTaxSolver2009_7.02.zipapplication/zip; charset=binary515.0 KB2010-02-02 01:360
v7.01
OpenTaxSolver2009_7.01.tgzapplication/x-gzip; charset=binary393.3 KB2010-01-26 11:540
v7.01_MacOSx
OpenTaxSolver2009_7.01_macosx.tgzapplication/x-gzip; charset=binary394.5 KB2010-01-26 11:540
v7.01_mswin
OpenTaxSolver2009_7.01.zipapplication/zip; charset=binary443.9 KB2010-01-26 11:540
v7.00
OpenTaxSolver2009_7.00.tgzapplication/x-gzip341.0 KB2010-01-11 03:470
v7.00_mswin
OpenTaxSolver2009_7.00.zipapplication/x-zip363.8 KB2010-01-11 03:470
OTS_2008
v6.05
OpenTaxSolver2008_6.05.tgzapplication/x-gzip413.3 KB2009-05-17 17:400
v6.05_mswin
OpenTaxSolver2008_6.05.zipapplication/x-zip503.9 KB2009-05-17 17:390
v6.04
OpenTaxSolver2008_6.04.tgzapplication/x-gzip413.3 KB2009-05-12 05:060
v6.04_mswin
OpenTaxSolver2008_6.04.zipapplication/x-zip503.8 KB2009-05-12 05:050
v6.03
OpenTaxSolver2008_6.03.tgzapplication/x-gzip404.0 KB2009-04-04 20:030
v6.03_mswin
OpenTaxSolver2008_6.03.zipapplication/x-zip493.2 KB2009-04-04 20:010
v6.02
OpenTaxSolver2008_6.02.tgzapplication/x-gzip404.5 KB2009-03-14 05:120
v6.02_mswin
OpenTaxSolver2008_6.02.zipapplication/x-zip492.0 KB2009-03-14 05:100
v6.01
OpenTaxSolver2008_6.01.tgzapplication/x-gzip386.9 KB2009-03-07 08:490
v6.01_mswin
OpenTaxSolver2008_6.01.zipapplication/x-zip444.8 KB2009-03-07 08:440
v6.00
OpenTaxSolver2008_6.00.tgzapplication/x-gzip347.9 KB2009-03-02 16:180
v6.00_mswin
OpenTaxSolver2008_6.00.zipapplication/x-zip389.1 KB2009-03-02 16:150
OTS_2007
v5.07
OpenTaxSolver2007_5.07.tgzapplication/x-gzip373.4 KB2008-04-15 15:320
v5.07_mswin
OpenTaxSolver2007_5.07.zipapplication/x-zip465.9 KB2008-04-15 15:310
v5.06_mswin
OpenTaxSolver2007_5.06.zipapplication/x-zip465.6 KB2008-03-06 05:330
v5.06
OpenTaxSolver2007_5.06.tgzapplication/x-gzip370.6 KB2008-03-06 05:310
v5.05
OpenTaxSolver2007_5.05.tgzapplication/x-gzip370.6 KB2008-02-23 17:550
v5.05_mswin
OpenTaxSolver2007_5.05.zipapplication/x-zip465.8 KB2008-02-23 17:520
v5.040
OpenTaxSolver2007_5.040.tgzapplication/x-gzip538.7 KB2008-02-17 16:370
v5.04
OpenTaxSolver2007_5.04.zipapplication/x-zip621.7 KB2008-02-16 07:370
v5.03
OpenTaxSolver2007_5.03.zipapplication/x-zip626.9 KB2008-02-10 21:590
v5.01
OpenTaxSolver2007_5.01.tar.gzapplication/x-gzip366.3 KB2008-02-09 10:470
v5.00
OpenTaxSolver2007_5.00.tar.gzapplication/x-gzip325.5 KB2008-01-27 22:340
OTS_2006
v4.07
OpenTaxSolver2006_4.07.tar.gzapplication/x-gzip354.0 KB2007-03-15 05:590
v4.07_mswin
OpenTaxSolver2006_4.07_mswin.zipapplication/x-zip451.1 KB2007-03-15 05:500
v4.06
OpenTaxSolver2006_4.06.tar.gzapplication/x-gzip353.9 KB2007-03-05 12:140
v4.06_mswin
OpenTaxSolver2006_4.06_mswin.zipapplication/x-zip450.4 KB2007-02-27 05:460
v4.02
OpenTaxSolver2006_4.02.tar.gzapplication/x-gzip199.1 KB2007-01-17 10:100
OTS_2005
v3.08
OpenTaxSolver2005_3.08.tgzapplication/x-gzip219.2 KB2006-04-23 22:260
zip_3.07
OpenTaxSolver2005_3.07.zipapplication/x-zip444.8 KB2006-04-03 08:560
v3.07
OpenTaxSolver2005_3.07.tgzapplication/x-gzip219.1 KB2006-04-03 06:500
v3.06
OpenTaxSolver2005_3.06.tgzapplication/x-gzip218.5 KB2006-04-01 05:120
zip_v3.06
OpenTaxSolver2005_3.06.zipapplication/x-zip444.6 KB2006-03-31 13:280
v3.05
OpenTaxSolver2005_3.05.tgzapplication/x-gzip140.1 KB2006-03-21 14:510
ms_3.05
OpenTaxSolver2005_3.05.zipapplication/x-zip364.0 KB2006-03-21 14:440
OTS_Canada_T1
T1_2005_v3.01
ots_Canada_T1_2005_3.01.tar.gzapplication/x-gzip21.3 KB2006-04-23 21:440
ots2004_Canada_T1
ots_Canada_T1_2004.tar.gzapplication/x-gzip18.5 KB2005-04-13 05:450
ots2003_canada_T1
ots_Canada_T1_2003.tar.gzapplication/x-gzip14.6 KB2004-10-05 14:270
OTS_GUI
ots_gui_0.5
ots_gui_0.5.tgzapplication/x-gzip89.7 KB2006-04-08 04:450
OTS_All_Packages
OTS_All_US_2004_src
OpenTaxSolver2004_src_20050312.tar.gzapplication/x-gzip70.0 KB2005-04-13 05:220
ots_all_US_packages_unix
ots_all_US_packages.tar.gzapplication/x-gzip252.9 KB2005-04-13 05:140
OTS_All_US_2004_msft
OpenTaxSolver2004_msft_20050312.zipapplication/x-zip358.5 KB2005-03-14 00:160
OTS_UK_sa151c
v0.1
ots_UK_2003.tar.gzapplication/x-gzip16.6 KB2004-11-21 16:470


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