If you wish to present a formal quote to your client along with taking the deposit, we recommend the following workflow:
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1. Create an estimate for the euthanasia
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2. Take a deposit for the estimate balance
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3. On the date of the euthanasia, convert the estimate to an invoice and enter the amounts of the controlled substances actually used (when the estimate is converted on the same day of the appointment, the appointment will remain on the schedule while future appointments would be automatically removed)
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The deposit that was collected earlier can then be applied against the newly-created invoice.