I was working in a company and moved to another company last March 2017. I already had a 30% ruling from my previous company. When HR in my new company tried to applied again for 30% ruling, Taxes office send a letter that my old company calculated my 30% ruling wrongly (they gave me extra money) and now there are pending money must be paid to taxes office. I've contacted my company and still waiting their feedback.

• Did anyone face this problem before and what did you do?
• Who should be responsible for this, company should pay as it is her mistake or i should pay (it is not small amount of money)?