Sage 300

sage 300 erp 2014 . After GL rollover has been performed there are 3 accounts that still show balance in it. they do not zero out. What could be possible reason?

I need to set up a new accrual for PTO in our payroll system. I know how to set it up, however the accrual was supposed to start on May 1, 2016. My question is...if I set this up now how to I go back and retroactively calculate the accruals so that…