How do I claim Withholding Tax back?

Hi, we get charged withholding tax from Botswana. We have the withholding tax certificates issued from BURS Botswana Unified Revenue Service, but how or where do we claim this back on our IRP6 form.

The foreign taxes paid (i.e the withholding taxes) would need to be reflected as the foreign credits on the IRP6 when asked for it on the form.