Completing your Company Tax Return form Help to fill in your online or paper Company Tax Return form CT600; how to pay or claim back the right amount of Corporation Tax
Submitting your Company Tax Return How to deliver your Company Tax Return to HMRC; what to include with form CT600; what happens after it's received
Claiming losses, allowances and reliefs Find help to claim capital allowances; loss relief; Marginal Rate Relief; Research & Development Relief; how to make elections
Chargeable gains and Corporation Tax Chargeable gains for companies and organisations explained; how to calculate; how to notify HMRC; how to pay tax on gains
Claims and elections for Corporation Tax Claims allow you to tell HMRC you're entitled to a relief; make an election to choose what to do for Corporation Tax purposes
Log in to Corporation Tax Online now Go direct to Corporation Tax Online to submit your Company Tax Return now if you are already a registered user
