Instances like deleting a tax used in a pos.order before closing a session is allowed but it renders error when closing the session because of imbalance move lines. In this commit, we are adding a 'balancing' line in the move before it is created. This ensures the closing of pos session. The introduced move line is named 'Difference at closing PoS session' and is a receivable making it easy to find and can be reconciled. closes odoo/odoo#62308 X-original-commit: 7b9545387962981b5729318e2bbc5714dcbac68c Signed-off-by: pimodoo <pimodoo@users.noreply.github.com> Signed-off-by: Joseph Caburnay (jcb) <caburj@users.noreply.github.com>