We have a Company based in South-Africa but all the work (professional engineering services) we do is for a Company Based in Tanzania. At the end of each service provided to this company we Invoice them and when they pay us they deduct 15% Withholding tax. Each year we receive Withholding Tax Certificates from this Company which we then submit to SARS when our accountant does the Company Tax Return via e-filing. The Withholding Tax Certificates we submitted to SARS this year was for the value of $40 000.00. Why does our Company not receive any refunds on the Withholding Tax that we pay?