My company only pays me 25p per mile for any travelling I do in my car. I've been informed that legally I'm entitled to 40p per mile and that I can claim the remainder from the tax office with a P111d form. Is this correct? Where do I get the P111d form from, do I have to request it from my employer? Also, how long can I back date it, can I request money for miles driven a year or 2 years ago, or just in this current tax year?
