Error: Input fields not found. Please reload.

"; return; } const grossIncome = parseFloat(tbtApp.grossAnnualIncomeInput.value) || 0; const deductions = parseFloat(tbtApp.totalAnnualDeductionsInput.value) || 0; if (grossIncome <= 0) { tbtApp.resultsContainer.innerHTML = "

Please enter a valid Gross Annual Income.

"; return; } const taxableIncome = Math.max(0, grossIncome - deductions); let totalTax = 0; let remainingIncome = taxableIncome; const taxBreakdownDetails = []; for (let i = 0; i < tbtApp.exampleTaxBrackets.length; i++) { const currentBracket = tbtApp.exampleTaxBrackets[i]; const nextBracketThreshold = (i + 1 < tbtApp.exampleTaxBrackets.length) ? tbtApp.exampleTaxBrackets[i+1].threshold : Infinity; const incomeInThisBracketLowerBound = currentBracket.threshold; const incomeInThisBracketUpperBound = nextBracketThreshold; if (remainingIncome <= 0) break; let amountToTaxInBracket = 0; if (taxableIncome > incomeInThisBracketLowerBound) { amountToTaxInBracket = Math.min(taxableIncome, incomeInThisBracketUpperBound) - incomeInThisBracketLowerBound; amountToTaxInBracket = Math.min(amountToTaxInBracket, remainingIncome); // Ensure we don't tax more than what's left from previous brackets // Correction: ensure amountToTaxInBracket is only calculated for income *within* this bracket segment if (taxableIncome > incomeInThisBracketLowerBound) { const taxablePortionInBracket = Math.min(taxableIncome - incomeInThisBracketLowerBound, incomeInThisBracketUpperBound - incomeInThisBracketLowerBound); amountToTaxInBracket = Math.max(0, taxablePortionInBracket); } else { amountToTaxInBracket = 0; } // Further clamp by remainingIncome if taxableIncome spans multiple brackets amountToTaxInBracket = Math.min(amountToTaxInBracket, remainingIncome); } else { amountToTaxInBracket = 0; } if (amountToTaxInBracket > 0) { const taxForBracket = amountToTaxInBracket * currentBracket.rate; totalTax += taxForBracket; remainingIncome -= amountToTaxInBracket; // This logic needs refinement for progressive calculation taxBreakdownDetails.push({ range: `${tbtApp.formatCurrency(incomeInThisBracketLowerBound)} - ${ (incomeInThisBracketUpperBound === Infinity ? "Over" : tbtApp.formatCurrency(incomeInThisBracketUpperBound -1))}`, rate: tbtApp.formatPercent(currentBracket.rate), incomeTaxed: tbtApp.formatCurrency(amountToTaxInBracket), taxPaid: tbtApp.formatCurrency(taxForBracket) }); } if (taxableIncome < incomeInThisBracketUpperBound) break; // No more income in higher brackets } // Recalculate totalTax using a clearer progressive method totalTax = 0; let incomeLeftToTax = taxableIncome; let previousBracketLimit = 0; taxBreakdownDetails.length = 0; // Clear previous calculation for(const bracket of tbtApp.exampleTaxBrackets) { if (incomeLeftToTax <= 0) break; const currentBracketUpperLimit = tbtApp.exampleTaxBrackets.indexOf(bracket) + 1 < tbtApp.exampleTaxBrackets.length ? tbtApp.exampleTaxBrackets[tbtApp.exampleTaxBrackets.indexOf(bracket) + 1].threshold : Infinity; const incomeInThisSpecificBracketRange = Math.min(incomeLeftToTax, currentBracketUpperLimit - bracket.threshold); if (incomeInThisSpecificBracketRange > 0) { const taxInThisBracket = incomeInThisSpecificBracketRange * bracket.rate; totalTax += taxInThisBracket; let rangeDisplay; if (currentBracketUpperLimit === Infinity) { rangeDisplay = `${tbtApp.formatCurrency(bracket.threshold)} and over`; } else { rangeDisplay = `${tbtApp.formatCurrency(bracket.threshold)} - ${tbtApp.formatCurrency(currentBracketUpperLimit - 1)}`; } if(bracket.threshold === 0) rangeDisplay = `Up to ${tbtApp.formatCurrency(currentBracketUpperLimit - 1)}`; taxBreakdownDetails.push({ range: rangeDisplay, rate: tbtApp.formatPercent(bracket.rate), incomeTaxed: tbtApp.formatCurrency(incomeInThisSpecificBracketRange), taxPaid: tbtApp.formatCurrency(taxInThisBracket) }); incomeLeftToTax -= incomeInThisSpecificBracketRange; } previousBracketLimit = currentBracketUpperLimit; } const netAnnualIncome = grossIncome - totalTax; const netMonthlyIncome = netAnnualIncome / 12; const effectiveTaxRate = grossIncome > 0 ? (totalTax / grossIncome) : 0; let breakdownTableHtml = `

Tax Breakdown by Bracket

`; taxBreakdownDetails.forEach(detail => { breakdownTableHtml += ``; }); breakdownTableHtml += `

Income Portion	Rate	Amount Taxed	Tax Paid
${detail.range}	${detail.rate}	${detail.incomeTaxed}	${detail.taxPaid}

`; tbtApp.resultsContainer.innerHTML = ` `; }; // --- PDF Generation --- tbtApp.generatePDF = async function() { if (!window.jspdf || !window.html2canvas) { alert('PDF generation library is not loaded.'); return; } if (!tbtApp.resultsContainer || !tbtApp.grossAnnualIncomeInput || !tbtApp.totalAnnualDeductionsInput || !tbtApp.exampleBracketsTableBody) { alert('Could not find necessary content for PDF generation.'); return; } // Ensure calculations are done tbtApp.displayTaxCalculation(); await new Promise(resolve => setTimeout(resolve, 100)); // Allow DOM to update const { jsPDF } = window.jspdf; const pdfExportContainer = document.createElement('div'); pdfExportContainer.classList.add('tbt-pdf-export-content'); pdfExportContainer.style.width = '800px'; pdfExportContainer.style.backgroundColor = '#fff'; const grossIncome = parseFloat(tbtApp.grossAnnualIncomeInput.value) || 0; const deductions = parseFloat(tbtApp.totalAnnualDeductionsInput.value) || 0; const taxableIncome = Math.max(0, grossIncome - deductions); let pdfHtml = `

Tax Bracket Impact - Annual Budget Summary

`; // Inputs Section pdfHtml += `

Inputs

`; pdfHtml += ``; pdfHtml += ``; pdfHtml += ``; // Example Tax Brackets Used pdfHtml += `

Example Tax Brackets Used (Single Filer)

`; pdfHtml += `

These are illustrative brackets for demonstration purposes only.

`; const bracketsTableClone = document.getElementById('exampleBracketsTable').cloneNode(true); // Remove thead background for PDF to allow th background to take effect via CSS bracketsTableClone.querySelector('thead').style.backgroundColor = 'transparent'; pdfHtml += bracketsTableClone.outerHTML; // Tax Calculation Summary from results container const resultsClone = tbtApp.resultsContainer.cloneNode(true); // Remove potentially unwanted parts or restyle for PDF resultsClone.querySelectorAll('.tbt-result-section').forEach(section => { section.style.border = '1px solid #eee'; // Lighter border for PDF sections section.style.padding = '10px'; section.style.marginBottom = '10px'; section.querySelectorAll('h4').forEach(h4 => h4.style.fontSize = '12pt'); section.querySelectorAll('.tbt-result-item').forEach(item => { item.classList.remove('tbt-result-item'); item.classList.add('tbt-result-item-pdf'); item.querySelectorAll('span').forEach(span => { if (span.textContent.startsWith('$')) span.classList.add('currency'); if (span.classList.contains('highlight-income')) span.style.color = '#2ecc71'; if (span.classList.contains('highlight-tax')) span.style.color = '#e74c3c'; }); }); section.querySelectorAll('.tbt-tax-breakdown-table th').forEach(th => { th.style.backgroundColor = '#f0f0f0'; // Lighter header for PDF table }); }); pdfHtml += resultsClone.innerHTML; // Add the processed results HTML pdfExportContainer.innerHTML = pdfHtml; document.body.appendChild(pdfExportContainer); try { const canvas = await html2canvas(pdfExportContainer, { scale: 2, useCORS: true, logging: false }); document.body.removeChild(pdfExportContainer); const imgData = canvas.toDataURL('image/png'); const pdf = new jsPDF({ orientation: 'p', unit: 'pt', format: 'a4' }); const pdfWidth = pdf.internal.pageSize.getWidth(); const pdfHeight = pdf.internal.pageSize.getHeight(); const imgWidth = pdfWidth - 40; const imgHeight = (canvas.height * imgWidth) / canvas.width; let heightLeft = imgHeight; let position = 20; pdf.addImage(imgData, 'PNG', 20, position, imgWidth, imgHeight); heightLeft -= (pdfHeight - 40); // 20pt margin top & bottom while (heightLeft > 0) { position = heightLeft - imgHeight; // Or position = position - pdfHeight + 40; pdf.addPage(); pdf.addImage(imgData, 'PNG', 20, position, imgWidth, imgHeight); heightLeft -= (pdfHeight - 40) ; } pdf.save('Tax_Budget_Impact_Summary.pdf'); } catch (error) { console.error("Error generating PDF:", error); alert("An error occurred generating PDF."); if (document.body.contains(pdfExportContainer)) document.body.removeChild(pdfExportContainer); } };