TaxBit Enterprise Production Troubleshooting - AI-Optimized Reference

Critical Configuration Requirements

Authentication Settings

• Token Expiry: Exactly 24 hours (not approximate)
• Refresh Timing: Refresh tokens 5 minutes before expiry to prevent batch job failures
• Concurrent Connections: Maximum 5 per API key (undocumented limit)
• Rate Limits:
  • 1 report generation per 5 minutes per account
  • 10 webhook configuration changes per hour
  • Bulk import endpoints have separate, lower limits

API Response Performance Thresholds

• Normal Response Time: 200-500ms
• Alert Threshold: 1.5 seconds (indicates load balancer stress)
• Timeout Risk: 2+ seconds (imminent timeout failures)
• Webhook Timeout: 30 seconds (TaxBit stops retrying after this)

Emergency Response Procedures

Critical Failures (Immediate Response Required)

Error Pattern	Root Cause	Business Impact	Fix Time	Solution
HTTP 401 Unauthorized	Token expired or rate limit violation	All operations stop	<5 minutes	Token refresh + rate limit backoff
Silent 200 OK with zero processing	Data validation failed silently	Silent data loss	15-30 minutes	Data format validation + re-import
Cost basis drift >5%	Timezone/timestamp inconsistencies	Compliance failure	2-6 hours	UTC standardization + data audit
SSL certificate verify failed	Certificate chain update (monthly)	Complete outage	<5 minutes	Update certificate store

Medium Priority Issues (Response within hours)

Error Pattern	Typical Duration	Mitigation Strategy
HTTP 504 Gateway Timeout	15-30 minutes	Wait + exponential backoff
HTTP 429 Rate Limited	1-5 minutes	Implement request queuing
Webhook silence >24 hours	Until manual intervention	Delete/recreate webhook endpoint
NetSuite sync delay >6 hours	Until API limit increase	Request higher API limits or use bulk import

Data Validation Requirements

Mandatory Format Standards

• Timestamps: ISO 8601 with timezone (UTC recommended): 2024-03-15T15:30:00Z
• Amounts: Numeric values (not strings)
• External IDs: Minimum 8 characters for global uniqueness
• Currency Codes: Must match TaxBit's supported currency list

Critical Validation Checks

// Pre-import validation prevents silent failures
function validateTransaction(transaction) {
  const errors = [];
  
  // Timestamp validation
  if (!transaction.timestamp.match(/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\.\d{3})?Z$/)) {
    errors.push(`Invalid timestamp format: ${transaction.timestamp}`);
  }
  
  // Amount validation
  if (typeof transaction.amount !== 'number' || isNaN(transaction.amount)) {
    errors.push(`Amount must be number: ${transaction.amount}`);
  }
  
  // External ID validation
  if (!transaction.external_id || transaction.external_id.length < 8) {
    errors.push(`External ID too short: ${transaction.external_id}`);
  }
  
  return errors.length > 0 ? errors.join('; ') : null;
}

Production Monitoring Requirements

Critical Health Checks

• API Response Validation: Verify data.processed_count matches input count
• Cost Basis Sampling: Weekly comparison with internal calculations
• Webhook Gap Detection: Alert if no webhooks received in 24 hours during trading periods
• Token Age Monitoring: Refresh at 20 hours to prevent 3AM failures

Infrastructure Dependencies

• AWS us-east-1 Status: TaxBit's primary region affects all services
• Exchange API Availability: Third-party pricing affects cost basis calculations
• IRS Systems: Degraded performance during tax season (March-April)

Alerting Thresholds That Work

// Monitoring configuration
const alertThresholds = {
  api_response_time: {
    warning: 1500,    // ms - load balancer stress
    critical: 2000    // ms - timeout risk
  },
  authentication_failures: {
    count: 3,
    timeWindow: 600000  // 10 minutes
  },
  data_validation_success_rate: {
    minimum: 90,      // percent
    timeWindow: 3600000  // 1 hour
  },
  cost_basis_drift: {
    maximum: 5,       // percent from internal calculations
    checkFrequency: 604800000  // weekly
  }
};

Implementation Architecture

Request Management

• Concurrency Limit: 3 concurrent requests (prevents rate limiting)
• Queue Strategy: FIFO with priority retry for failed requests
• Timeout Configuration: 30 seconds (matches TaxBit's webhook timeout)

Error Handling Strategy

// Retry logic for different error types
const retryStrategies = {
  429: {  // Rate limited
    maxAttempts: 5,
    delayFunction: (attempt) => Math.min(1000 * Math.pow(2, attempt), 60000)
  },
  500: {  // Server error
    maxAttempts: 3,
    delayFunction: (attempt) => Math.min(500 * attempt, 5000)
  },
  'ECONNRESET': {  // Network issues
    maxAttempts: 3,
    delayFunction: (attempt) => Math.min(1000 * attempt, 10000)
  }
};

Data Processing Limitations

Transaction Volume Constraints

• Audit Reports: Fail silently with >100K transactions in date range
• DeFi Transactions: >10K events cause memory issues
• Staking Rewards: Complex compound rewards cause timeouts

DeFi Transaction Complexity

Single Uniswap trade generates 4-6 TaxBit transactions:

1. ETH → ETH (impermanent loss recognition)
2. Token swap within pool
3. LP token receipt (new cost basis)
4. Fee payments in gas tokens

Cost Basis Calculation Issues

• Multi-jurisdiction: Different methods per region (US=FIFO, UK=pooled, Germany=special rules)
• Timestamp Ordering: UTC vs local timezone affects FIFO calculations
• Silent Failures: Wrong calculations appear as successful

Recovery Procedures

When TaxBit API Fails

1. Switch to local cost basis calculations (temporary measure)
2. Use export APIs for data sync when service recovers
3. Maintain backup systems for compliance deadlines

When Data Import Fails Silently

1. Implement idempotent retry logic with transaction fingerprinting
2. Use SHA256 of transaction details to detect duplicates
3. Verify data appears in system after "successful" import

When IP Whitelisting Breaks

1. Maintain backup API credentials with different network paths
2. Use hostname-based firewall rules instead of IP-based
3. Monitor for monthly IP changes (TaxBit changes without notice)

Business Impact Assessment

High-Impact Failures

• Silent data loss during import: Compliance violations, audit failures
• Cost basis calculation errors: Financial reporting inaccuracies, tax compliance issues
• Authentication failures during batch processing: Delayed regulatory filings

Medium-Impact Failures

• API slowdowns: Reduced operational efficiency, delayed reporting
• Webhook interruptions: Event loss requiring manual reconciliation
• Integration sync delays: Stale data affecting decision-making

Cost and Resource Requirements

Time Investment for Fixes

• Token refresh implementation: 2-4 hours development
• Robust validation system: 8-16 hours development + testing
• Production monitoring setup: 4-8 hours configuration
• Full integration hardening: 40-80 hours (including testing and documentation)

Expertise Requirements

• API Integration: Understanding of OAuth flows, rate limiting, error handling
• Tax/Accounting: Knowledge of FIFO/LIFO methodologies, cost basis calculations
• DevOps: Monitoring, alerting, infrastructure management
• DeFi Knowledge: Understanding of complex transaction types and their tax implications

Hidden Costs

• Manual reconciliation time: 2-4 hours weekly for data validation
• Emergency response overhead: 24/7 monitoring during tax season
• Compliance audit preparation: Additional documentation and validation requirements