March 31st should be the final date can apply for Covid 19 60 days. If you get the stamp on March 31st, the visa should be extended to the end of May. You can ask the immigration office to confirm
I have the same question with your. I applied 60 days with embassy letter on Oct. with embbAnd the expire date is Dec 30. I want to apply again for another 60 days. Do I need to apply for the embassy letter again because I am not sure if I can get the lettee again.