You can use the HMRC online service to file your company, charity or association’s: Company Tax Return (CT600) for Corporation Tax.

How do I fill out a CT600?

CT600 form: what you need to fill in

  1. Company information (boxes 1-4): basic company details.
  2. About this return (boxes 30-35): state the accounting period the return relates to.
  3. About this return (boxes 80-85): tick the box to say whether the accounts are for the period you’ve stated, or a different period.

Other ways to file You can only use the paper form (CT600) if either: you’re unable to file online because you have a reasonable excuse. you want to file in Welsh.

Are there any changes to the HMRC ct600l?

HMRC have made changes to the CT600 which include an extra supplement CT600L for claiming either type of R&D related Tax Credit, the SME R&D Tax Credit & RDEC for large companies. These went live on 6th April 2021. Here is the new CT600L and the CT600L guide. Contact RandD Tax if you want to discuss changes to CT600.

Are there any problems with the new ct600l?

Extract from the new CT600L covering SME R&D Tax Credit Claims. As with many software roll outs this one is not without problems. It is an evolving situation but at present two types of issues exist. Some Software providers have not updated their software to reflect the change.

When does alphatax switch to the ct600l?

Alphatax will automatically switch to completing the CT600 (2021) for company tax returns, including the CT600L when it is relevant, from the calendar date 1 April 2021. The CT600L forms part of version 3 of the CT600 and so applies for all accounting periods starting on or after 1 April 2015.

When is ct600l supplementary page for are & D introduced?

HMRC are introducing the CT600L supplementary page for Research and Development (R&D) which must be used for any new or amended submissions from 1 April 2021. There are a number of points we would suggest taxpayers affected by this form should be aware of as we approach this date.