PayPal Payment Buttons: Untick the address checkbox when shipping goes off

[millerf]

Fixes WOOPTP-579

Proposed changes

• Turning Add shipping off hid the Collect shipping address checkbox but left it ticked, so the next save kept sending collect_shipping_address: true. PayPal stored it and buyers were asked for a shipping address the seller could no longer see or turn off.
• The shipping toggle now owns the checkbox: turning shipping off resets it with the shipping mode and fees.
• The one exception is a tax taken from the PayPal profile, which PayPal rejects without an address. In that case the address stays collected, as the (locked) checkbox already says.
• Not covered here: switching the tax back from profile to a specific rate while shipping is off also leaves the address collected. That is a smaller variant of the same gap and can follow separately.

Related product discussion/links

• WOOPTP-579, part of the certification audit in WOOPTP-569.

Does this pull request change what data or activity we track or use?

No.

Testing instructions

• Connect a site to PayPal (sandbox is fine) and add a PayPal Payment Buttons block with a saved payment link.
• In the block form, tick Add shipping, tick Collect shipping address, then untick Add shipping. Update the post.
• Open the published page and go through the button's checkout: PayPal no longer asks for a shipping address. Before this change it did.
• Tick Add tax and pick the tax type that takes the rate from your PayPal settings, so the address checkbox is locked on. Now toggle Add shipping on and off: the save still succeeds (PayPal would reject it without the address).

🤖 Generated with Claude Code

[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WoA dev site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin (Jetpack), and enable the fix/paypal-shipping-address-follows-shipping-toggle branch.
• To test on Simple, run the following command on your sandbox:

bin/jetpack-downloader test jetpack fix/paypal-shipping-address-follows-shipping-toggle

Interested in more tips and information?

• In your local development environment, use the jetpack rsync command to sync your changes to a WoA dev blog.
• Read more about our development workflow here: PCYsg-eg0-p2
• Figure out when your changes will be shipped to customers here: PCYsg-eg5-p2

[github-actions]

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Jetpack plugin:

The Jetpack plugin has different release cadences depending on the platform:

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  • Scheduled release: October 6, 2026

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Paypal Payment buttons plugin:

No scheduled milestone found for this plugin.

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[jp-launch-control]

Code Coverage Summary

This PR did not change code coverage!

That could be good or bad, depending on the situation. Everything covered before, and still is? Great! Nothing was covered before? Not so great. 🤷

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