Projects / Open Tax Solver

Open Tax Solver

OTS is an easy program for calculating personal income tax form entries and taxes-owed or refund due. It handles forms such as US-Fed-1040, with Schedules A, B, C, and D, forms 8829 and 8849, AMT worksheets, and state income taxes for several large states.

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RSS Last announcement

Pay Withholding Deductions Calculator Added 29 May 2010

A pay-check withholding calculator has been added to the OpenTaxSolver (OTS) project. It helps adjust your paycheck tax withholding deduction amoun...

RSS Recent releases

  •  15 Jan 2012 19:04

    Release Notes: This release contains US1040, with schedules A, B, C, and D, form 8829, and the new 8849 forms. It also contains updated state tax versions for California, New York, Pennsylvania, New Jersey, North Carolina, Massachusetts, Ohio, and Virgina. Precompiled versions for Linux, MS Windows, and Mac OS X are posted, along with source code. This version includes several improvements such as better worksheet coverage and printouts, as well as additional checks for filing requirements.

    •  08 Jan 2012 18:52

    Release Notes: This is a minor update on last year's (tax-year 2010) US 1040. It includes additional printouts in the Carry-over worksheet, and a fix on line 6 of Schedule-L. The new 2011 version of OTS for this year is undergoing testing and is expected to be released next week.

    •  29 Mar 2011 06:24

      Release Notes: This update includes enhancements to the US-1040 Alternative Minimum Tax (AMT) form 6251 with added comments on AMT worksheet lines 6-27. These changes will not affect many filers, but will be convenient for those with suitable situations.

      •  22 Mar 2011 04:41

      Release Notes: This update adds Schedule-M calculations to the US-1040. It also includes a fix to the final line of NJ State form in the case of owed taxes. The OTS GUI now places quotes around filenames that contain spaces, so they are handled properly by the calculation routines.

      •  11 Feb 2011 09:55

        Release Notes: This update includes a fix for NY State Tax program when importing federal 1040 data to read line 9 instead of 9b. It also includes a minor improvement in the GUI for reminding users to save form data if changed.

        RSS Recent comments

        09 Feb 2012 02:11 krgkg

        check this in the fed-1040

        L[42] = 3650.0 * L[6];

        should it be?

        L[42] = 3700.0 * L[6];
        sorry i can't file a bug report right now

        20 Jan 2012 08:15 aroberts

        Chris, yes sorry I had not replied to your earlier message. We are reviewing your IT-203 form for inclusion in the OTS package.
        Thanks!
        -- Aston

        15 Jan 2012 01:59 fernandesc Thumbs up

        Hi Aston

        Hope this reaches you.

        I had emailed your yahoo account in Sept 2011 with patches for 2010 NYS IT- 203 (non-resident state form used by the nj bridge-and-tunnel crowd). Did not hear back, and took that to mean I should contact you on freecode instead of the address on the ots web page. So got my freecode login, but I still cannot see any developer discussions or details on how to submit. I'll admit I am new to this. I'm expecting that updating the NYS IT-203 will be easier than writing from scratch, so there is a good chance to get it done before Apr 17, far earlier than last year.

        Should I check in the 2010 changes on the sourceforge tracker:bugs?

        Thx
        Chris

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