To enter Special Withholding Tax on a CT600, follow these instructions:

CT600 (2015) Version 3

• SimpleStep mode – CT600 Core > Reliefs and deductions in terms of tax > Double taxation relief.
• HMRC Forms mode –  CT600 Core > Page 5 > Box 450.

CT600 (2008) Version 2

PLEASE NOTE: This box is only available on the full form so you will need to switch to this type to complete the below instructions.

• SimpleStep mode – CT600 full > Reliefs and deductions in terms of tax > Double taxation relief.
• HMRC Forms mode –  CT600 Full Form > Page 4 > Box 73.