When I try to import an IIF file I get "Error line 6." How do I fix this?

The issue is a negative payment amount which your version of QB will not support. To find it,

  1. Go to Billing Admin > Invoices & Payments > Payment Sum tab
  2. Generate a report for the month of the IIF file you tried importing to QB
  3. Look in the refund column for a negative amount

So QB does not allow this amount to be negative; i.e., a negative payment. It's fine in SwimOffice but not QB. Did you write a refund check or was it a CC refund?

Did any of the IIF file go into your QB? If not TeamUnify can manually adjust the IIF file so it will import and you can manually enter in your refund amount on your QB side. Just email support@teamunify.com with the details.

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See Also
When does the QuickBooks IIF file generate?
Why are my transferred QB amounts negative?
How do I manually enter in TeamUnify CoA into QuickBooks?