Posting Type
This determines whether or not the journals are posted by Ledger Import and if so the conditions that must apply. Options are:

Post if No Errors Found - select this to only post the journals if they pass the validation rules. Post - select this to post the journals regardless of whether or not they pass the validation rules. Validate Only - select this to only validate the journals but not post them. This option is not available if the online posting method is being used.

For information on these posting types see Dealing with Errors in Ledger Import.
Posting Write to Hold
Select this to post the journals as held journals in Financials.
Provisional Posting
Select this to post the journals as provisional postings. Leave this blank to post the journals as permanent transactions. This is only required if provisional postings are optional in Financials.
Allow Bal Txns When Post if no Err
Select this to allow the creation and posting of system generated balancing transactions when the Post Transactions option is set to Post if no Errors Found, if the imbalance has been caused by a system calculation. For example, if the imbalance is a rounding difference as a result of currency conversion calculations. If this option is not set, system generated imbalances are treated as errors which prevent the journal being posted.
Base Suspense Account
The Financials account to which a balancing journal transaction is posted if the balancing adjustment is required in the base currency. You cannot select a suspended or closed account, or a memo account. If the account code on a journal transaction is invalid this account is used as the substitution.
Transaction Suspense Account
The Financials account code to which a balancing transaction is posted if the transaction currency journal values do not balance and the amount of the imbalance is greater than the rounding tolerance. This is only required if the transaction currency is in use for the business unit. You cannot select a suspended or closed account, or a memo account.
Reporting Suspense Account
The Financials account code to which a balancing transaction is posted if the second base or reporting currency journal values do not balance and the amount of the imbalance is greater than the rounding tolerance. This is only required if the second base or reporting currency is in use for the business unit. You cannot select a suspended or closed account, or a memo account.
Post Balance By
The additional transaction details for which the journal lines must balance. This imposes an additional level of balancing, over and above the normal journal balancing requirements. If you do not wish to impose additional balance conditions select No Extra Balancing. Otherwise select one of the following options to ensure the journal transactions balance for the selected field: ledger analysis 1 to 10, transaction date or transaction reference.
Note: The Transfer Options allow you to transfer selected field values from the Order Fulfillment source transaction into the journal Transaction Date and Transaction Reference fields. If you choose to balance the journal by either of these fields you must ensure that the transfer options will not prevent the journal balancing. For example, if the Post Balance By option is set to Transaction Reference, and one of the Transfer Options transfers different transaction reference values onto each journal line, the journal will not balance. 
Report Errors Only
If this is set the Ledger Import report only reports on transactions that contain field value substitutions or which have been rejected. Leave this blank to report on all of the transactions.
Note: If you use online posting for processing ledger postings and have not specified a report in Ledger Interface Setup, a default report is produced when using ledger import. You can switch this off by checking this check box.
Suppress Substitute Message
If this option is selected substitution lines for blank accounting periods, transaction dates and other insignificant substitutions are excluded from the Ledger Import report.
Posting Report Format
The document format to be used for the Ledger Import posting report that is produced automatically when journals are posted to Financials. The document format must have been defined using Document Formats Setup.
Allow Over Budget
This allows a journal posting to take a ledger account over budget regardless of any budget checking controls in place.
Post to Suspended Accounts
Allows the journal transaction to post to a suspended Financials account.