Teeters et Al, if you look at page TR3 on the SA100 2016, box 8, you need to enter State Pension - the amount you were entitled to receive in the year, not the weekly or 4-weekly amount.
Regarding the lack of a P60, unlike pay or other pensions, the State Pension is notified at the start of the year and will usually remain fixed unless you die in which case you will lose interest anyway
