It's not there, these are the fields:
Maximum number of domain aliases
Maximum number of subdomains
Disk space
MySQL databases quota
Microsoft SQL databases quota
Maximum amount of traffic
Maximum number of web users
Maximum number of MySQL databases
Maximum number of mailboxes
Mailbox quota
Maximum number of mail redirects
Maximum number of mail groups
Maximum number of mail autoresponders
Maximum number of mailing lists
Maximum number of Java applications
Maximum number of shared SSL links
Maximum number of ODBC connections
Validity period