count yourself once, and only once.

There are multiple ways to complete the Census. Make sure that you only complete the Census once, and that it counts everyone in the household where you sleep most nights. If you complete the Census in one method, you do not need to complete it in any other method. 

The online portal for the Census will open on the Census Bureau's website on March 12, 2020. 
Census takers will begin visiting homes on April 1, 2020 to ensure that households have completed the Census correctly.