Itr-1 or itr-4s to claim lta during itr

In our orgnization during the financial year starting we've to opt whether ill claim LTA or not for the year.

Initially i didn't opted for LTA claim, so the amount is splitted and credited to my salary.

During the financial year, i've performed journey on leave.  Now i want to claim my LTA while filing ITR.

For this year i noticed ITR-1 and ITR-4S are available for Individuals.

Can someone suggest how to claim LTA during e-filing of ITR - which form to use?

Thanks in advance.