If the rent paid during given financial year is greater than Rs 1 Lakh, the employee will have to provide the PAN card details and copy of the landlord / property owner in order to claim HRA tax exemption. (policybazaar.com)
In a given financial year, if you are outside of India for more than 182 days, you are NRI for tax purposes. (money.stackexchange.com)
At a broad level, If you have stayed for more than 182 days in India for a given financial year 1st April to next 31st March. (money.stackexchange.com)