Error - ValidationException and "an unbalanced transaction cannot be recorded"

Hello WendyH 

In regards to an unbalanced transaction cannot be recorded This issue is caused by 3 decimal places in the line item causing the transaction to be unbalanced. You will need to click in the field and manually type the amounts. This should bypass the issue and allow you to send the invoice without error.

As you mention it's a validation error when saving recurring transactions you can also follow this Help Article on ValidationException error.

please let me know how this goes.

Please let me know how this goes.