Business registration and tax filings are handled by the tax office with jurisdiction over your business address. You can find your jurisdictional office instantly by entering your business address into the "Find Your Tax Office" menu on the NTS website. To check whether a business partner's registration is active, suspended, or closed, use the "Business Registration Status Check" on Hometax — just enter the registration number for an instant result.
Checking a counterparty's status before starting a transaction helps avoid tax invoice problems that can arise from dealing with a closed business.
What you need to look things up
Can I still transact with a suspended business?
A business in suspended status often cannot issue valid tax invoices, so confirm whether they've filed to resume operations before continuing to transact. Dealing with a closed business risks losing your input tax credit.