SaaS advanced payment accounting

SaaS advanced payment accounting

I have seen this asked multiple times in forums on Zoho and never answered.

I have a SaaS company and charge for my services annually in advance.  I invoice for the full year ahead of offering service.  The system won't let me choose unearned revenue for my account, only a revenue account.  Right now the only way I can see how to do this is through manual entries, which will not work well in a high volume environment.  I would appreciate some help.

Thank you