Double taxation relief for corporation tax

Hi, How can i get a supplementary pages for online filling for double taxation relief on corporation tax. UK company carried some work in Denmark and had deducted WHT against the profits. Invoices Paid in GBP . Can this be set against the corporation tax? WHT certificates received. I just can not find the option to get supplementary pages when i try to fill accounts online. Thanks

Hi Indre Sim,
The company tax return does not include a supplementary page specifically for double-taxation relief. 
Companies claim relief by completing box 450 of the CT600.
Your computations should include a detailed calculation of this figure, including details of any underlying tax relief.
If you wish to include any supporting documents, you can attach them to the tax return.
You can find a guide to completing the company tax return atThe Company Tax Return guide. 
Thank you.

 

But when i try to fill CT600 section 450 is not available. Also some of the softwares does not have option to fill section 450. I can only see that available on paper version. Can you please advise?

Hi Indre Sim,
Thank you for your query. 
We first suggest that you contact your software supplier to discuss this issue if you have not already done so. 
HMRC cannot provide support for commercial software products.
If your software package does not include the relevant box of the CT600 form, we suggest that you consider purchasing a software package that meets your company’s needs.
HMRC has published a list of recognised suppliers of commercial software products and services here:
Commercial software suppliers for Corporation Tax
Thank you.