Dear
A) If you want to know last date of creation of sale order field and table is:- VBAK-AUDAT
Just go to VA05N enter customer and execute you will get document get column just sort in
descending order and can find out last document date for customer.
B) For PGI date you can use MB51 / VL06O enter customer number and find your date.
C) For billing document go to T code VF05N and select column Billing Date and sort in descending order with this you can find latest date of billing document hit to accounts.-VBRK-FKDAT
regards
