How can I add an "Estimated Hours" field/category to Tempo?

[Pete P]

My business users want me to add another field that testers can log time to on issues called "Estimated Hours".  Ideally this would work just like logging regular time and I could also report on the "Estimated Hours".  I am not sure the best way to implement this.  But I think possibly I can add a category and have users log time to the category.  However I can't see where I can add categories as we are not currently using them.  FYI I am Jira systems admin.  Any advice or link to solution is most appreciated.  

Update:  It looks like I may be able to use "Plan Time" for this. Not sure if we are using that field. Thoughts? 

[Pete P · Accepted solution]

Moderator please delete this post I will rephrase