Changing the Default distribution account in r12

Hello

My understanding is when we upgraded from 11.5.10.3 to 12.1.3, the upgrade populates what was in 11i into E-Business Tax.  Therefore, you can still use tax as you did in 11i without having to go thru and do the complete E-Business Tax set-up immediately.

It seems like some of the functionality is gone though.  I am trying to change the distribution account associated with a Tax Classification Code and cannot find the form to do it.  I see the incorrect code combination Id in the zx.zx_accounts and ap.ap_tax_codes_all tables, but even after updating the values in the table, the wrong ccid is still populated on the Invoice Workbench form.