You have set up a Flow to automatically assign a resource's manager to the approver...

Step-by-Step Comprehensive Detailed Explanation

Understanding the Timecard Approval Process in PSA

By default, the timecard approval process in Certinia PSA (formerly FinancialForce PSA) follows a specific hierarchy.

If the project is abillable projectand theProject Manager field is filled, theProject Manager is automatically assigned as the approverfor timecards​.

If the Project Manager field is blank or the project isnon-billable, PSA uses theresource’s manageras the approver (based on the Manager field in the Salesforce User record).

How Flows Work in Assigning Approvers

If you have created a Flow to automatically assign the resource’s manager as the timecard approver, it means you are trying to override the default approval process.

However, if theAssign Project Manager To Timecard Approverconfiguration option is enabled,PSA will still prioritize the Project Manager over the resource’s manager, regardless of your Flow settings​.

This would explain why submitted timecards are still being assigned to theProject Managerinstead of theresource's manager.

Why the Other Options Are Incorrect

A. PSA requires that only Project Managers can approve Timecards

This is incorrect because PSA allows timecards to be approved byeither the Project Manager or the Resource's Manager, depending on the project settings​.

B. The process builder to assign the resource’s manager is not active

While this could be a factor, themain reasonis the configuration setting that forces the Project Manager to be the default approver.

Even if the Flow was working correctly, theAssign Project Manager To Timecard Approversetting would still take precedence.

How to Fix the Issue

Navigate toPSA Configuration Settingsand check theAssign Project Manager To Timecard Approversetting.

If it is set toTrue, change it toFalseto allow the Flow to correctly assign the resource's manager as the approver.

Test by submitting a new timecard and verifying the assigned approver.

References and Verified Certinia PSA Documentation

PSA System Administration Guide: Timecard Approval Process​.

FinancialForce PSA Approval Workflow: Default Approver Rules​.