Mandatory vs. Optional Fields: Ensuring Compliance for South Korea’s e-Tax Invoices
Avoid 2% sur-tax penalties. Learn the 4 mandatory fields (필요적 기재사항) required for a legally valid South Korean e-tax invoice and how they differ from optional data.
Guide to Korea’s Joint Certificate System for e-tax invoice Compliance
Confused by Korea's Joint Certificate? Learn what this digital seal is and identify exactly which certificate types allow you to issue a compliant e-tax invoice.
2026 Monthly Guide: Critical e-Tax Invoice Deadlines in Korea (Stay Compliant)
Check the exact 2026 e-tax invoice deadlines in Korea, including holiday extensions. Avoid penalties with Bolta’s automated scheduling and reporting system.
Streamlining Your B2B Billing in Korea: Invoice vs. e-Tax Invoice
Optimize your billing workflow in Korea. Learn the critical differences between a regular invoice and a mandatory e-tax invoice, and why the 'write date' is key.
