This is the date at which the scheme changed to the current status. For example; if the scheme was closed to new members, you would need to provide the date from which it closed.
Scheme year-end is the last day and month of the scheme's accounting period, ie the day/month at the end of the period for which the scheme accounts are drawn up each year.
The scheme year-end (see above) can be changed. If scheme year-end is changed, then this is the date it became effective.
You need to be aware that HMRC recently changed the format for all tax references for registered schemes. Take a look at the HMRC user guide for help in obtaining the tax reference:
An example reference number is: 12345678RL.
A Pension Scheme Tax Reference (PSTR) is the unique reference given to a scheme by HMRC when a scheme has been registered for tax relief and exemptions. It has 10 characters made up of 8 numbers followed by 2 letters. A scheme's PSTR is the one that evidences its status as a registered pension scheme.
For Public Service schemes you may need to contact the Responsible Authority for your scheme to confirm the PSTR.