[PATCH] - bug #554394 - Income Tax Enhancements

[J. Alex Aycinena]

Hello,

I am submitting patches that implement the following enhancements
related to Income Taxes in Gnucash:

- update the tax information in 'txf.scm', which is based on V037 of
the TXF Spec,  to V041, the last version issued (bug #554394)
- provide support for multiple copies of certain tax Forms/Schedules
(e.g., Schedule C(1), Schedule C(2), etc.)
- support multiple types of tax entities: partnerships, corporations
and S corporations, in addition to individual tax payers
- support balance sheet accounts, required for these new tax entity types
- add the term 'Income' in several places to avoid confusion with
sales or VAT style taxes in the business features (e.g., change the
menu from 'Tax Options' to 'Income Tax Options')

The following files were changed, as follows, to implement these changes:

1. src/engine/Account.c and
2. src/engine/Account.h: add copy number capability (define
'xaccAccountGetTaxUSCopyNumber' and 'xaccAccountSetTaxUSCopyNumber');
modify 'xaccAccountSetTaxUSCode' to remove KVP when no tax-code
assigned, clean up tax-source descriptions

3. src/gnome/gnc-plugin-basic-commands.c: change 'Tax Options' to
'Income Tax Options'

4. src/app-utils/gnc-ui-util.c and
5. src/app-utils/gnc-ui-util.h: add setter and getter functions for
book tax name and book tax type which are stored in a book KVP, show
copy information in accounts page, tax column, show error messages for
various conditions

6. src/app-utils/app-utils.i: add 'gnc_get_current_book_tax_name' and
'gnc_get_current_book_tax_type' functions

7. src/gnome/dialog-tax-info.c: add copy number and tax entity name
and type, and balance sheet account handling capability

8. src/gnome/glade/tax.glade: add tax entity name, tax entity type,
asset, liability/equity and copy number widgets

9. src/tax/us/txf.scm: update to V041 for individuals, add V041
support for multiple additional tax entity types and balance sheet
accounts and related tax codes, add tax form line data

10. src/tax/us/us.scm: export new functions defined in txf.scm

11. src/report/locale-specific/us/taxtxf.scm: add support for multiple
copies of Forms/Schedules, add support for Format 6, use Form/Schedule
line #'s to sort report, update from "V037" to "V041", add support for
taxpayer types other than F1040, add warning messages if there are
some inconsistent codes assigned and list

These changes are in the attached patchfile which was generated
against svn r18406.

I would appreciate it if someone could approve and commit these
changes. I've tested them quite extensively and it would be good if
they could be included in the development test releases before the
next stable release.

Regards and thanks,

Alex
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