You can deploy a WAR file either through your Tomcat Manager application or by simply uploading your WAR file in the following directory:
appservers/apache-tomcat-xx/webapps
Where you replace apache-tomcat-xx with the actual Tomcat directory created after your Tomcat instance has been installed.
Please note that the Tomcat will auto deploy your WAR files. You need to make sure that your Tomcat is installed and running before it can auto deploy your WAR