[FIX][MTD VAT V12] raising reconcile error before submitting

unreconciled accounts needed to be raised before a submission is processed.

account_mtd_vat/models/mtd_vat_endpoint.py

@@ -391,6 +391,15 @@ def _handle_vat_submit_returns_endpoint(self):
  "Chart of Taxes can not be generated!\n " +
  "Please create HMRC Posting Templae record first "
  )
+ for rec in hmrc_posting_config:
+ if not rec.output_account.reconcile:
+ raise exceptions.Warning(
+ "The account {} is not marked as reconciliable !".format(rec.output_account.name)
+ )
+ elif not rec.input_account.reconcile:
+ raise exceptions.Warning(
+ "The account {} is not marked as reconciliable !".format(rec.output_account.name)
+ )
 
  vrn = self.get_vrn(self.vrn)
  period_key = urllib.parse.quote_plus(self.select_vat_obligation.period_key)