AVG offers a number of license packs for both Home and Business customers.
To verify which license pack you have purchased (instructions for AVG 2013):
"Product Name: AVG Internet Security 2013 (Full, 2 seats)" = You can install the AVG program by using the displayed AVG License Number on 2 computers.
If you are using AVG 2012 or an older version, you can find the license information as described here. Always search for the "Number of seats".
Other AVG products:
AVG PC TuneUp: Please contact us using one of the available channels on AVG Customer Support website.
AVG Family Safety: You can find the information in your AVG MyAccount on the My Products tab.
AVG LiveKive: The number of installations is not limited.