Delay to pay 2019 taxes

On 3/17/20:  Treasury Secretary said on Tuesday said that individuals will be able to defer up to $1 million in tax payments to the IRS for 90 days in light of the corona virus outbreak.

 

If I have already e-filed and with that scheduled my tax payment, how do I change the date of the payment to take advantage of this deferment?

 

Can I split the taxes owed into 3 payments?