Override the payment amount when creating payments for the sales order.

To verride the payment amount defaulted by Avalara when creating payments for Sales orders.

According to Field Level Help on Payment Amount:

Important: Be aware that now this field is always defaulted from the sales order TOTAL field, but this might change in future. Make sure you create a workflow to control this field’s value to be the TOTAL less the sum of deposits associated with the order.”

1. Navigate to Customization > Workflow > Workflows > New
2. Basic Information:
   • Name: Enter name
   • Record Type: Select Transaction
   • Sub Record Type: Select Sales Order
   • Execute as Admin: Enter Checkmark
   • Released Status: Select Released
   • Keep Instance and History: Select Always
   • Enable Logging Checkbox:  Enter Checkmark
3. Event Definition:
   • On Create: Enter Checkmark
   • On View or Update: Enter Checkmark
4. Click Save
5. Right top corner: Click Fields 
6. Click New Workflow Field
   • Label: Enter Label 
   • Type: Select Currency
7. Click Save
8. Click State 1
9. Bottom right corner: Click New Action
10. Click Set Field Value
11. Basic Information:
    • Trigger On: Select Before Record Submit
12. Parameters:
    • Field: Select Payment Amount (Workflow)
13. Value:
    • Select From Field 
    • Record (Join Field): Select Current Record
    • Field: Select Payment Session Amount
14. Click Save
15. Click State 1
16. Bottom right corner: Click New Action
17. Click Set Field Value
18.  Basic Information:
    • Trigger On: Select Before Record Submit
19. Parameters:
    • Field: Select Payment Session Amount
20. Value:
    • Select From Field 
    • Record (Join Field): Select Current Record
    • Field: Select Payment Amount (Workflow)
21. Click Save
22. Click Save