As the Accountant, we close the books for our clients so that they cannot accidentally change closed accounting data.  We do not share the password with our clients.  With Estimates being non-posting transactions, the client should be able to modify an Estimate without having to put in a password and without having to contact us to "open" the accounting period just to change an Estimate.  That wastes both of our times.  As it stands now, I cannot close the period for a few of my clients because they are constantly updating Estimates.  It seems like QBO could figure out how to allow non-posting transactions to not be affected by closing periods.  I waste so much time trying to re-balance accounts on a monthly basis because I can't close the books.