Check this option to specify a write-off percent and have the write-off value apply to all lines. When selected, the percentage specified in the FC Amount or FC Percentage field will be multiplied against each line of the invoice equally. The write off amount for each line will be based on the line's amount and the percentage.

Do not check this option if you do not want to write off finance charges by percent and have the value applied to all lines. Finance charges will be written off using one of the other methods.