flowing data from page to multiple table?

I have added one text field in three table and one page
Gen.Journal Line,G/L Entry,and bank account Ledger Entry table and bank payment voucher page now in order to save data i enter from page to field in table Gen.Journal Line no need of any customization but how to flow that field data in other two table after click post on Home Tab of ribbon.
may be i have to make some changes in codeunit 231 of post action but i don't know exactly what changes

Thanks in advance.