Download OpenTaxSolver

OTS for the 2025 Tax-Year:

Each package contains US 1040 Fed taxes, Scheds 1-3, A-D, and forms 6251, 8949, & 8889 updated for the 2025 tax-year. It also includes updated State-Tax versions for OH, NC, NJ, NY, VA, PA, MA, AZ, CA, MI, OR, and several additional Forms. Each package includes pre-compiled executables for the given platform, as well as source-code and build-scripts in case re-compiling is ever needed.

	For Linux - January 27, 2026     OpenTaxSolver2025_23.00_linux64.tgz   (18.1-MB)                   [sha1sum=8d85b1a2663062c131837d7c3e501872e75ed591]     - Package is a gzip'd tar-file. To unpack,             tar xfz OpenTaxSolver2025_23.00_linux64.tgz     - Unpacks into a directory of similar name.     - Start by double-clicking or running:   ./Run_taxsolve_GUI .
	For Chromebooks - January 27, 2026     OpenTaxSolver2025_23.00_linux64.tgz   (18.1-MB)                 [sha1sum=8d85b1a2663062c131837d7c3e501872e75ed591] - See Instructions for running OTS on Chromebooks.
	For MS-Windows - January 27, 2026 - Same as above, but for MS-Windows: In Zip package ...     OpenTaxSolver2025_23.00_mswin.zip   (36.0-MB)               [sha1sum=e20aa2ebaeeebf82e419dc9946eae2a93576e62d] Or in 7zip: OpenTaxSolver2025_23.00_mswin.7z   (26.0-MB)               [sha1sum=cbc7d4e29d3a2a1ab81038f685d11664caad2b8a]         (For older PC's running 32-bit XP, Windows-7, etc.:             OpenTaxSolver2025_23.00_mswin32.zip   (23.3-MB)                     [sha1sum=e9ca3c5a7e4002775c0d6b6691363d185dc2d88c]                   OpenTaxSolver2025_23.00_mswin32.7z   (20.4-MB)                     [sha1sum=84b4f53f87fcbe0582f60d19cd5e9d882b0a50d8]             The mswin32 version does not support the newer GUI features.           ) - Contains compiled binary executables for MS-Windows PCs, with source-code. - Start by double-clicking:   Run_taxsolve_GUI       (This just invokes bin\ots_gui2.) .
	For Apple Mac-OSx - January 27, 2026 - Same as above, but for Apple Macs:     OpenTaxSolver2025_23.00_MacOSx.tgz   (22.5-MB)                   [sha1sum=317a9e45bd5b3ca79c4e033187c5d66b327e4cfa] - Double-click on package to unpack. Navigate to top directory inside. - First time after unpacking, you need to set the files as trusted       by holding your Control-key down while double-clicking on the       file :     MacSetup.command                         (See: Instructions for Running on Macs.) - Start OTS by clicking:   Run_taxsolve_GUI

For increased security, you can authenticate the contents of your downloaded package by checking the sha1sum. (A convenient GUI for checking your sha1sum on all platforms is GtkHash.)

You can provide feedback on any issues or bugs, by emailing to aston_roberts@yahoo.com. Please include in your message: the version of OTS, your Operating System (OS), which Form(s), and how you are using OTS (by GUI or command-line). And check back here periodically for updates.

Prior Year's Versions

  .   .   .   OpenTaxSolver Development Project   .   .   .