diff --git a/austax/__init__.py b/austax/__init__.py
index 93997f0..04b6dde 100644
--- a/austax/__init__.py
+++ b/austax/__init__.py
@@ -49,25 +49,25 @@ def plugin_init():
 	drcr.plugins.transaction_providers.append(make_tax_transactions)
 
 @assert_aud
-def make_tax_transactions(start_date=None, end_date=None):
+def make_tax_transactions(transactions, start_date=None, end_date=None):
 	# Get EOFY date
 	dt = eofy_date()
 	
 	if (start_date is not None and start_date > dt) or (end_date is not None and end_date < dt):
-		return []
+		return transactions
 	
 	report = tax_summary_report()
 	tax_amount = report.by_id('total_tax').amount - report.by_id('offsets').amount
 	
 	# Estimated tax payable
-	transactions = [Transaction(
+	transactions.append(Transaction(
 		dt=dt,
 		description='Estimated income tax',
 		postings=[
 			Posting(account='Income Tax', quantity=tax_amount.quantity, commodity=reporting_commodity()),
 			Posting(account='Income Tax Control', quantity=-tax_amount.quantity, commodity=reporting_commodity())
 		]
-	)]
+	))
 	
 	# Mandatory study loan repayment
 	loan_repayment = report.by_id('loan_repayment').amount
@@ -83,6 +83,7 @@ def make_tax_transactions(start_date=None, end_date=None):
 	
 	# Get trial balance
 	balancer = TrialBalancer.from_cached()
+	balancer.apply_transactions(transactions)
 	
 	accounts = dict(sorted(balancer.accounts.items()))
 	
diff --git a/drcr/webapp.py b/drcr/webapp.py
index dae6e90..6bf7007 100644
--- a/drcr/webapp.py
+++ b/drcr/webapp.py
@@ -70,7 +70,7 @@ def api_transactions(start_date=None, end_date=None):
 	
 	# Plugins
 	for transaction_provider in transaction_providers:
-		transactions.extend(transaction_provider(start_date=start_date, end_date=end_date))
+		transactions = transaction_provider(transactions, start_date=start_date, end_date=end_date)
 	
 	return transactions