To avoid manually entering information twice and ensure it appears on both the Opportunity record

and the Payment record, follow these steps:

Create Payment Mappings in NPSP Settings:

Navigate to NPSP Settings.

Go to "Donations" and select "Payment Mappings".

Create mappings to ensure that relevant fields from the Opportunity record are automatically

populated in the Payment record.

Create Custom Fields on the Payment Object:

Navigate to Setup.

In the Object Manager, select "Payment".

Click on "Fields & Relationships".

Create custom fields that correspond to the Opportunity fields you want to map.

Ensure the field types match those on the Opportunity object to facilitate accurate data transfer.

These steps automate the data transfer between Opportunities and Payments, reducing manual

entry and ensuring consistency across records.

Reference:

Salesforce NPSP Documentation: Payment Mappings

Salesforce Trailhead: Custom Fields