Due date of TCS Returns

1. According to the proviso to sec 206(3) For the FY 2018-19 due date for TCS return for all the 4 quarters would be 15th of July, 15th October, 15th January and 31st May of next FY (for 4th quarter). Form 27EQ is to be filed. 
Please correct me if the above solution has an alternative view.

It would be 15th of may instead of 31 of May for the 4th quarter.