DrCr/austax/__init__.py

111 lines
4.8 KiB
Python

# DrCr: Web-based double-entry bookkeeping framework
# Copyright (C) 2022–2024 Lee Yingtong Li (RunasSudo)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
from flask import render_template, url_for
from drcr.models import AccountConfiguration, Posting, Transaction, TrialBalancer, reporting_commodity
from drcr.database import db
from drcr.webapp import eofy_date, sofy_date
import drcr.plugins
from . import views # Load routes
from .reports import tax_summary_report
from .util import assert_aud
def plugin_init():
drcr.plugins.data_sources.append(('cgt_adjustments', 'CGT adjustments'))
drcr.plugins.advanced_reports.append(('cgt_assets', 'CGT assets'))
drcr.plugins.advanced_reports.append(('tax_summary', 'Tax summary'))
drcr.plugins.account_kinds.append(('austax.income1', 'Salary or wages (1)'))
drcr.plugins.account_kinds.append(('austax.income5', 'Australian Government allowances and payments (5)'))
drcr.plugins.account_kinds.append(('austax.income10', 'Gross interest (10)'))
drcr.plugins.account_kinds.append(('austax.income13', 'Partnerships and trusts (13)'))
#drcr.plugins.account_kinds.append(('austax.income18', 'Net capital gain (18)'))
drcr.plugins.account_kinds.append(('austax.income20', 'Foreign source income and foreign assets or property (20)'))
drcr.plugins.account_kinds.append(('austax.d2', 'Work-related travel expenses (D2)'))
drcr.plugins.account_kinds.append(('austax.d4', 'Work-related self-education expenses (D4)'))
drcr.plugins.account_kinds.append(('austax.d5', 'Other work-related expenses (D5)'))
drcr.plugins.account_kinds.append(('austax.d9', 'Gifts or donations (D9)'))
drcr.plugins.account_kinds.append(('austax.d15', 'Other deductions (D15)'))
drcr.plugins.account_kinds.append(('austax.offset', 'Tax offset'))
drcr.plugins.account_kinds.append(('austax.paygw', 'PAYG withheld amounts'))
drcr.plugins.account_kinds.append(('austax.cgtasset', 'CGT asset'))
drcr.plugins.account_kinds.append(('austax.rfb', 'Reportable fringe benefit'))
drcr.plugins.transaction_providers.append(make_tax_transactions)
@assert_aud
def make_tax_transactions(transactions, start_date=None, end_date=None, api_stage_until=None):
if api_stage_until is not None and api_stage_until < 300:
return transactions
# 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 transactions
# Get trial balance
balancer = TrialBalancer.from_cached(start_date=sofy_date(), end_date=dt)
balancer.apply_transactions(transactions)
report = tax_summary_report(balancer)
tax_amount = report.by_id('total_tax').amount - report.by_id('offsets').amount
# Estimated tax payable
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
if loan_repayment.quantity != 0:
transactions.append(Transaction(
dt=dt,
description='Mandatory study loan repayment payable',
postings=[
Posting(account='HELP', quantity=loan_repayment.quantity, commodity=reporting_commodity()), # FIXME: Correct account
Posting(account='Income Tax Control', quantity=-loan_repayment.quantity, commodity=reporting_commodity())
]
))
accounts = dict(sorted(balancer.accounts.items()))
# Get account configurations
account_configurations = AccountConfiguration.get_all_kinds()
# PAYG withholding
for account_name, kinds in account_configurations.items():
if 'austax.paygw' in kinds:
if account_name in accounts and accounts[account_name].quantity != 0:
# Transfer balance to Income Tax Control
transactions.append(Transaction(
dt=dt,
description='PAYG withheld amounts',
postings=[
Posting(account='Income Tax Control', quantity=accounts[account_name].quantity, commodity=reporting_commodity()),
Posting(account=account_name, quantity=-accounts[account_name].quantity, commodity=reporting_commodity())
]
))
return transactions