Tjb47

Hi please can someone help My husband draws his state pension in Oct 2023. His state forecast shows he has one year short of a full pension but 2016-2022 he has full contributions , he paid nothing 2022/3 as he retired from his job . He has just today paid £665.70 to make 2015/16 a full year. Will he now get the full state pension ? If not and infact he should have paid 2022/3 how can we get the 2015/16 payment reversed and make right the error? Thanks