Converted l10n_br, l10n_cn, l10n_gr, l10n_mx, l10n_tr, l10n_us and l10n_pe modules as per new tax design.

i remark you changed here the type of account, i suppose this is because of
addons/l10n_gr/account_tax.xml:        <field name="property_account_expense_categ" ref="chartgr_64_98"/>
which mean you cannot create a supplier invoice with the default accounts.

I'd rather like that you change the account chosen for the expense category to any of the child of chartgr_64_98. Let's say chartgr_64_98_00 for example