What should i do for "Enter the portion of line 3 that can be attributed to March 27, 2020,through December 31, 2020" on form 1040

"The Coronavirus Aid, Relief, and Economic Security (CARES) Act permits certain individuals who file Schedule SE or Schedule H to defer the payment of 50% of the social security tax imposed for the period beginning on March 27, 2020, and ending December 31, 2020." See page 6 of the 1040 Instructions. 

In other words, because of the pandemic, certain taxpayers are being allowed to delay (not eliminate) paying the self-employment taxes (also called payroll taxes), which is what Schedule SE calculates. 

Do you want to defer any of your self-employment tax? (Of course, it will just have to paid in 2021).