Started working just over a month ago, first pay packet have paid just over 20%(basic rate) tax. Queried it and have been asked for p45. As I stopped working about 10 years ago when I went on ML , took a 5 year career break, my p45 was issued in about 2002. They still want it if I can find it or to fill in a p46(?). Even so will my code be adjusted to reflect the fact that I haven't previously earned in this tax year or will I have to wait until April anyway then claim any tax overpayment back ?