Fixed the URL of the 3351 brought-forward subject in the balance sheet to the income statement before the current period in the accounting application.

accounting/templates/accounting/balance-sheet.html

@@ -293,7 +293,6 @@ First written: 2020/7/20
           </li>
           {% for item in group.details %}
             <li class="list-group-item d-flex justify-content-between align-items-center account">
-              {# TODO: Link to the income statement for account #3351 #}
               <a class="list-group-item-action" href="{{ item.url }}">
                 {{ item.title|title }}
                 <div class="float-right">

accounting/views.py

@@ -719,7 +719,7 @@ def balance_sheet(request, period):
             code=Account.ACCUMULATED_BALANCE)
         brought_forward.amount = balance
         brought_forward.url = reverse(
-            "accounting:income-statement", args=(period,))
+            "accounting:income-statement", args=(period.period_before(),))
         accounts.append(brought_forward)
     balance = Record.objects \
         .filter(