Can i add more than one email to my security

AVG Protection
1

my partner as a email address so that 2 computer on same modem are coverd

2

Hello Maurice, 

We are glad to clarify it.
You have AVG Internet Security (Multi-Device). This can be used up to 10 devices. You do not need to link your partner email address. You can just use the same activation code on your parter device too. 

Refer the below links to install and activate AVG Internet Security :

Installing AVG Internet Security (https://support.avg.com/SupportArticleView?urlname=Install-AVG-Internet-Security) 
Activating AVG Internet Security (https://support.avg.com/SupportArticleView?urlname=Activate-AVG-Internet-Security)

Please try the above steps and let us know. Thank you.