What do I do if I don't have a tax reference number but have been working for a few years? The company I was first employed to took my documents to register at SARS, however I left a little while after that. Now at my new employer, 2 years later, I notice that my tax number is missing from my IRP5. It seems I have not been registered. I have not filed taxes since then however I am on PAYE and tax is deducted monthly. Am I in big trouble?