If you bought a license you can phone and email support 24/7/365.
You can generally get a price online for a 3+ user license and therefore you'd be paying for an extra one. If you only need one or two licenses I'd suggest giving one of a resellers near you a call - use the link below to find a reseller. http://www.sophos.com/en-us/partners/partner-locator.aspx
If you're interested in managing your computers (e.g., getting a bit of a reporting - via a web console - on the installations on both your Mac and Windows computers) and maybe even protect your smartphone you may be interested in Sophos Cloud. https://www.sophos.com/en-us/products/cloud.aspx
If you bought a license you can phone and email support 24/7/365.
You can generally get a price online for a 3+ user license and therefore you'd be paying for an extra one. If you only need one or two licenses I'd suggest giving one of a resellers near you a call - use the link below to find a reseller. http://www.sophos.com/en-us/partners/partner-locator.aspx
If you're interested in managing your computers (e.g., getting a bit of a reporting - via a web console - on the installations on both your Mac and Windows computers) and maybe even protect your smartphone you may be interested in Sophos Cloud. https://www.sophos.com/en-us/products/cloud.aspx