Hi Sandip,
Thanks for your response. In the meantime, I've figured out why it's not populated. You have to have the payroll posting settings set to post in detail.
To turn on Post in Detail - Tools > Setup > Posting > Posting
Select Series: Payroll
Select Origin: All
Mark "Post In Detail"
Select to Save
Then for future payroll postings, that field will be populated. But for exisitng postings, you won't have that information.
We had two payroll postings that were posted to the wrong GL accounts. I'm trying to figure out how to create a journal entry to fix this. Without the PAYROLCD field populated, I'm not sure how to do it.