I currently live in the UK, after I graduated with a Bachelor's degree a few weeks ago.
Both this summer and the previous summer I have been employed by the university as a Research Assistant. The first paycheck from this summer arrived and is less than expected (well, I haven't seen the actual paycheck, I just saw less money than expected in my account). The difference seems consistent with the income tax I should pay.
I am aware that at the end of the financial year, HMRC can send tax return letters if one has not earned enough in the past year to get to an upper band but has been taxed for it.
The question is: is there any way to check I have been taxed during the last summer and ask for a refund? Also, if I am taxed this year, is there any way to ask for the taxes back, considering I will leave the UK after the current contract ends (end of August)?