Hi there, @jjm723. You can split an entry between principal and interest using the Amount option when splitting the transaction.
When you use the Amount, you'll only enter a value on the first line. QuickBooks automatically fills in the second line based on the amount remaining from the total. For example, if the total amount is 137 and you enter 100 on the first line, QuickBooks will automatically enter 37 on the second line.
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