Register for the ACT here: 

https://www.act.org/content/act/en/products-and-services/the-act.html

Register for the SAT: 

https://collegereadiness.collegeboard.org/sat/register

Admissions Testing Updates in Relation to COVID-19

ACT Updates: http://www.act.org/content/act/en/covid19.html

SAT Updates: https://pages.collegeboard.org/sat-covid-19-updates