[IMP] l10n_in: Simplify GST invoice

GST Treatment:
   * Is show that how This invoice or partner is treated in GST
   * Set default value in customer
   * This is help in GST retrun filing.
   * Value of treamtmnet as below
	- Registered Business - Regular
	- Registered Business - Composition
	- Unregistered Business
	- Consumer
	- Overseas
	- Special Economic Zone
	- Deemed Export
   * GSTIN is required in
	- Registered Business - Regular
	- Registered Business - Composition
	- Special Economic Zone
	- Deemed Export

GSTIN:
   * GST identification number or GST number
   * There can be multiple GSTIN for a single person, being an assessee under the Income Tax Act for every State or Union Territory in which such person operates from
   * Add Validate of this number using regular expression

remove field l10n_in_export_type and l10n_in_import_export becouse it's covered by GST Treatment
remove field l10n_in_partner_vat becouse not use anyware.

0 files changed, 0 insertions, 0 deletions