Pension administrators must register with HMRC's Pension Schemes Online in order to submit their information.

The following information must now be submitted online:

• Applications to register a pension scheme
• Registered Pension Scheme Returns
• Accounting for Tax Returns
• Scheme Administrator's Declarations
• Event Reports
• Notifications of the winding-up of a registered pension scheme
• Notifications of a scheme administrator terminating their appointment

An HMRC spokeswoman said:

"If you're a pension scheme administrator, and you haven't registered to file online, you should do so as soon as possible. Otherwise you may be storing up problems for the future."

A guide to using the service is available on HMRC's website.