add auto-calculation of CIT form commit

2025-12-04 21:09:07 +05:30
parent 4fce58adec
commit 7ee2376455
2 changed files with 90 additions and 0 deletions
--- a/static/js/cit_calc.js
+++ b/static/js/cit_calc.js
@@ -0,0 +1,89 @@
+document.addEventListener("DOMContentLoaded", function () {
+
+    const fields = [
+        "gross_total_income", "disallowance_14a", "disallowance_37",
+        "deduction_80ia_business", "deduction_sec37_disallowance", "deduction_80g",
+        "net_taxable_income", "tax_30_percent", "tax_book_profit_18_5",
+        "tax_payable", "surcharge_12", "edu_cess_3", "total_tax_payable",
+        "mat_credit", "interest_234c", "total_tax",
+        "advance_tax", "tds", "tcs", "tax_on_assessment", "refund"
+    ];
+
+    function getVal(id) {
+        let el = document.getElementsByName(id)[0];
+        return el ? parseFloat(el.value) || 0 : 0;
+    }
+
+    function setVal(id, value) {
+        let el = document.getElementsByName(id)[0];
+        if (el) el.value = Number(value).toFixed(2);
+    }
+
+    function calculate() {
+
+        // Base values
+        let gross_total_income = getVal("gross_total_income");
+        let disallowance_14a = getVal("disallowance_14a");
+        let disallowance_37 = getVal("disallowance_37");
+
+        // Deductions
+        let d80_business = getVal("deduction_80ia_business");
+        let deduction_sec37 = getVal("deduction_sec37_disallowance");
+        let deduction_80g = getVal("deduction_80g");
+
+        // Net Taxable Income
+        let net_taxable_income =
+            (gross_total_income + disallowance_14a + disallowance_37)
+            - (d80_business + deduction_sec37)
+            - deduction_80g;
+
+        setVal("net_taxable_income", net_taxable_income);
+
+        // 30% tax
+        let tax_30_percent = net_taxable_income * 0.30;
+        setVal("tax_30_percent", tax_30_percent);
+
+        // Book profit tax (user input)
+        let tax_payable = getVal("tax_book_profit_18_5");
+        setVal("tax_payable", tax_payable);
+
+        // Surcharge 12%
+        let surcharge_12 = tax_payable * 0.12;
+        setVal("surcharge_12", surcharge_12);
+
+        // Education Cess 3%
+        let edu_cess_3 = (tax_payable + surcharge_12) * 0.03;
+        setVal("edu_cess_3", edu_cess_3);
+
+        // Total Tax Payable
+        let total_tax_payable = tax_payable + surcharge_12 + edu_cess_3;
+        setVal("total_tax_payable", total_tax_payable);
+
+        // MAT + Interest
+        let mat_credit = getVal("mat_credit");
+        let interest_234c = getVal("interest_234c");
+
+        // Total Tax
+        let total_tax = total_tax_payable + mat_credit + interest_234c;
+        setVal("total_tax", total_tax);
+
+        // Assessment → Advance Tax + TDS + TCS
+        let advance_tax = getVal("advance_tax");
+        let tds = getVal("tds");
+        let tcs = getVal("tcs");
+
+        let tax_on_assessment = advance_tax + tds + tcs;
+        setVal("tax_on_assessment", tax_on_assessment);
+
+        // Refund (or payable)
+        let refund = total_tax - tax_on_assessment;
+        setVal("refund", refund);
+    }
+
+    // Attach listeners
+    fields.forEach(id => {
+        let el = document.getElementsByName(id)[0];
+        if (el) el.addEventListener("input", calculate);
+    });
+
+});
--- a/templates/add_cit.html
+++ b/templates/add_cit.html
@@ -4,6 +4,7 @@
 <head>
    <title>CIT Form Entry</title>
    <link rel="stylesheet" href="{{ url_for('static', filename='index.css') }}">
+    <script src="/static/js/cit_calc.js"></script>
    <style>
        /* ...existing styles... (no changes needed) */
        * {