I'm 19 and work during the weekends, 9hrs a week.
I left my first job and gave my P45 about 3 weeks ago to my new employer. The tax code on my P45 was 1100L.
I have one job and my tax code for my current job is 0TW1.
I thought 0TW1 should change to 1100L because I gave my P45 in? should it?