If you need to cancel, vary, resubmit or submit, any attendances from a previous financial year, you will need to fill in a form, to request authority to do so.
You can find the fact sheet & form here.
When you get authorisation to cancel/vary/resubmit/submit previous financial year attendances, please first send the authorisation to support via email (firstname.lastname@example.org) and then let the support team know you have sent it, in the support chat.
One of the support team will cancel or vary the relevant attendances for you.
You can then update & resubmit any varied attendances and submit any new attendances for the relevant weeks. There is nothing further to do with any cancelled attendances.