Advance payment = 50000 * (1-20%) * 30%-2000 =10000 yuan.
Final settlement of year-end taxable income
= Labor income+annual wage income tax exemption-special deduction for mortgage (65438+ 0000 per month)-annual insurance.
=50000+ 12* 10000-5000* 12- 1000* 12- 1800* 12
=76400
Taxable amount = 76400 *10%-2520 = 5120 yuan.
For overpaid taxes, you can apply for tax refund.