If this option is selected, the sales tax direction for the current journal line in the current voucher is controlled by ...

If this option is selected, the sales tax direction for the current journal line in the current voucher is controlled by the selection in the Sales tax direction field in the Main accounts - chart of accounts: %1 page for the ledger account in the Account field on the journal line. If customer payments are recorded on a voucher together with a fee from the bank, the sales tax direction on the sales tax posting of the fee is determined to be outgoing (Sales tax payable), because customer accounts exist in the current voucher. By selecting the Sales tax direction field on the line with the fee, the sales tax direction will be taken from the main account, and consequently, is set to Sales tax receivable if the sales tax direction is set to Purchase. To verify the actual sales tax direction for the journal line, click the Sales tax button.