in sales order (tdsls400.crep) contains XXX999 and tfacr200.crep contains yyy999.

now i want to change as per sales order what is the session to change in finance i.e XXX999

use tfacr2520m000 to open specific invoice it will open tfacr2525s000 session then go to miscellaneous tab & fill sales representative.

i think this will help you to update sales representative.

thx.............

if payment is already received , the system is not allowing to change tfacr200.crep.. how to correct and what is the other session.

not interested to correct table level.

I tried in FP2, it's allowing me to change tfacr200.crep but when i am trying FP7 tfacr200.crep field is disabled.
without table correction you cannot change this field or you can ask Infor to do some modification on this session.