Adding Custom fields to Account

Adding Custom fields to Account

I do not use Zoho CRM but Salesforce. 

I'd like to categorize my tickets as Standard account tickets or Executive account tickets, that level depends on each account Account (I do have this info from the Salesforce synch). But I do not see anywhere in Zoho Desk Account section the possibility of adding such information as a field I can then filter. 

Is there a way to create a custom filed for the Account where I can assign that status level? If so could I get this info directly from SF?
I've seen custom account fields in the forum but doesn't feel to be available in Desk.