[IMP] l10n_in: change fiscalyear_last_month to march

With this commit: we are changing fiscalyear_last_month to March if
chart template is Indian chart template as fiscal year ends in 31 March
in India.

task-2723849

closes odoo/odoo#81982

Signed-off-by: Josse Colpaert <jco@odoo.com>

addons/l10n_in/models/chart_template.py

@@ -17,6 +17,13 @@ class AccountChartTemplate(models.Model):
                     journal['name'] = _('Tax Invoices')
         return res
 
+    def _load(self, company):
+        res = super(AccountChartTemplate, self)._load(company)
+        if self == self.env.ref("l10n_in.indian_chart_template_standard"):
+            company.write({'fiscalyear_last_month': '3'})
+        return res
+
+
 class AccountTaxTemplate(models.Model):
     _inherit = 'account.tax.template'