RUSSELL

Hello, I have noticed Iam missing 6 years qualifying years towards my stage pension (I'm 43 so I understand there's time to make this up). There are two queries. One year 2013/14 I was a self employed TV Art Director and paid my tax as normal via my accountant but for some reason it says this year is missing?? Second query, for two of the years I was actively seeking work in TV and had done some little jobs and in the meantime I was sending out emails and CVs to crew members. I wasn't receiving any job seekers/universal credit as this hadn't crossed my mind. I do still have some of the emails but much of it was ringing other industry crew to see if they needed me.Can this be used as proof and if so who should I send to?