Why is the tax classification code not getting defaulted from Contract Header to Contract lines?

**This post was created as part of a How to Service Request (SR)

Release:

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Summary of the question:

The understanding was that users choose the Tax classification code at the contract header -> Overview tab and then the same will be defaulted to each contract lines created.

According to this Doc ID 2114969.1, it is expected that tax code from contract header gets defaulted to contract line.

Why is this not happening?

Supporting Documents

PJB: Tax Setup In Oracle Fusion Project Billing (Doc ID 2114969.1)