The OTS GUI is an optional Graphical User Interface for all Open Tax Solver programs and tax-form versions. It provides a simple way to enter and edit your tax-data and to run the tax-solver on it. The OTS GUI is written to work with any OTS tax data file, both past, present, and future.

The OTS GUI contains no specific tax-form data itself, but rather it reads your selected tax-form file and configures itself accordingly. By virtue of OTS-GUI, all OTS versions now automatically have a GUI front-end, and anyone, even without GUI-writing experience, may create new tax programs having this graphical front-end.

The OTS_GUI is based on GIMP Tool Kit (Gtk). It compiles easily and runs properly on Linux, Mac OS, and Microsoft Windows. Gtk was chosen for its cross-platform support and modern look and feel.


Start the GUI by executing Run_taxsolve_GUI in the top OTS directory. Then select the tax form you wish to work on, and click the Open Tax File button near the bottom of the opening screen. A file browser will then show the available files for the selected form. Select the file you want to open, and click OK. All tax-form files are .txt files. For example, US_1040_example.txt . Normally you will start by selecting the ..._template.txt file, for whichever form you selected. You will enter your numbers and save it to a name you choose, such as US_1040_robert.txt. On subsequent sessions, you will select and open your file name. (After you run OTS, you will also see ..._out.txt files. These are the output files. They are not input form files, so you cannot to open them from the OTS GUI.)

Once you open a form file, you will see text boxes with line instructions. Enter numbers in text boxes for each line of the tax form which applies to you. If you need a new box (to add another entry for a given line), press the small plus-sign (+) near the bottom-right of the box for the given line. To edit the comment on a line, click the (*) button at the end of the line. A dialog box will come up with an edit window to edit or add a comment. In the future, more functions may be added. To remove a previously added text-box, just erase the value in the text-box. After you save the file, then the next time you open it the extra empty text-box will be gone. For other changes, you may need to edit the tax-data file with a text editor and then re-read the file into the GUI.

Save by clicking the Save button. You can choose to overwrite your original file, or give it a new name.

To calculate your taxes, click Compute Taxes button at the bottom. The results will go to your text window and the output file.

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