By default, posting specifies the current item number, the current account, and the current sales-tax code. If there is no specification for this combination, posting for the current item number and the current account is used but without specification of the sales-tax code. Microsoft Dynamics AX then continues to search in the posting table until it finds a posting that matches the current transaction. The search sequence is defined by the current settings in the customer and vendor parameters in the Primary sales posting, Primary consumption transaction, Primary discount posting, Primary receipt posting, and Primary discount postingfields for the current account.

If primary posting is set to Item, Microsoft Dynamics AX searches in the following order:

1. Item number, Account, Sales tax code.

2. Item number, Account.

3. Item number, Account group, Sales tax code.

4. Item number, Account group.

5. Item number, All accounts, Sales tax code.

6. Item number, All accounts.

7. Item group, Account, Sales tax code.

8. Item group, Account

9. Item group, Account group, Sales tax code.

10. Item group, Account group.

If primary posting is set to Customerand Vendor, Microsoft Dynamics AX searches in the following order:

1. Item number, Account, Sales tax code.

2. Item number, Account.

3. Item group, Account, Sales tax code.

4. Item group, Account.

5. All items, Account, Sales tax code.

6. All items, Account.

7. Item number, Account group, Sales tax code.

8. Item number, Account group.

9. Item group, Account group, Sales tax code.

10. Item group, Account group.

The above allows you to set up general posting rules for all items, all accounts, and all sales-tax codes. You can define primary posting in customer parameters for sales, consumption, and discounts, and in vendor parameters for receipts and discounts.