Set up Field Tracking History for Salesforce Billing

Order Fields

• Activated by
• Status
• Billing Day of the Month
• Bill Now
• Invoice Batch

Order Product Fields

• Bill Through Date Override
• Billable Unit Price
• Billed Amount (without tax)
• Billed Tax (useful if you are using a tax integration package)
• Contracted
• Hold Billing
• Invoice Run Processing Status
• Last Charge To Date
• Last Invoice Target Date
• Next Billing Date
• Next Charge Date
• Override Next Billing Date
• Pending Billing Amount (without tax)
• Tax Calculation Status
• Tax Error Message
• Terminated Date

Invoice Fields

• Status
• Tax Status
• AR Status
• Action
• Corrective Action (Payment Run)
• Invoice Locked

Invoice Line Fields

• Status
• Tax
• Tax Status
• AR Status
• Revenue Schedule Status
• Legal Entity

Usage Summary Fields

• Status
• Invoice Run Processing Status
• Unbilled Quantity
• Unbilled Subtotal
• Usage Count

Invoice Run Fields

• Status
• CleanUp Status
• Apex Job Id
• Completed Time

If more fields need to be tracked, refer to Increase the 'Number of Fields to Track History per Entity'.