i'm going to put in numbers, so you can get a true picture as it's really strange!
For my slip dated 31/12/04, I show:
Gross Pay to Date 10,500
Tax Free to Date 91.00
Taxable Pay to Date 658.00
Previous Tax to date 2700.00
this was for 2 months of work-i know that 2700.00 of taxes wasn't taken out over those 2 months, right?!
it's so strange. but i don't want to mess up my taxes and not claim i paid enough!