Hi qbteachmt,

Thanks for your reply and the link.

The new income logs have already been entered into General Journal Entries in QB for 3 months. If we need to change the records to invoice, we have to export 3 months' General Journal Entries in QB. Then import them as invoices.

What we need to do now is exporting the old income logs in our old accounting system. Then import them into the General Journal Entries of QB.