I’m uncertain to whom you are referring as “them” and what the ‘template’ is to cover. uk/paye-forms-p45-p60-p11d/p45 explains that the P45 is provided by your employer when you stop working for them; and that it shows how much tax you’ve paid on your salary so far in the tax year (6 April to 5 April); and that the form has 4 parts. Part 1 goes to HM Revenue, parts 2 & 3 are to be given to your new employer, and the employee retains Part 1A.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.