You have the right to get a copy of the information that is held about you. This is known as a subject access request (SAR) and you can make a request to HMRC under the Data Protection Act.
Further information can be foundhere.
Comment
Not sure what you would find out about yourself but still worth knowing about.
"I have used The Learn Centre on a number of occasions and have found it provides a great platform to gain the knowledge required to carry out my job. I started off with the Payroll Technician course and this in-depth learning gave me a great foundation of payroll knowledge to build upon and give me the confidence to progress up the career ladder, well worth it and would certainly recommend, no matter what level you are at there will be a course/qualification that can help you."
Ayman Zagloul
HR Analyst at Queen's University Belfast