Solutions :-

 For posting bills in the account, we used voucher approvals. There are different types of voucher approvals in account modules such as Purchase Voucher, Purchase return voucher, transport bill, material sales, RMC sales voucher, material issue Dr note, salary, contractor bill, machine posting.

Voucher approvals requires various steps  -

Transactions>voucher Approvals>purchase voucher approval >normal posting

Note - same process for rest of the voucher approval