Fixed - amount on journal will remain after posting. Used if the amount is the same for every period.
Variable - amount on journal will be deleted after posting. Used if the amount is not the same for every period.
Balance - amount on the journal line will be allocated amount accouns specified in te Gen. Jnl. Allocation table.
Reversing Fixed - same as number (1) plus a balancing entry posted with the following day as the posting date.
Reversing Variable - same as number (2) plus a balancing entry posted with the following day as the posting date.
Reversing Balance - same as number (3) plus a balancing entry posted with the following day as the posting date.