Line items are not summarized due to taxes

Hi Friends,

According to note no:36353,I maintained settings in OBCY and sales revenues,deductions are summarized if my billing document(VF01) having above 999lineitems.But if my customer is liable for taxes, then revenues,deductions are not summarizing in accouting document if line items are more than 999 and I am unable to release it to accounting(VF02).

Can some one please advice me.

regards,

Seetaram