Just to close this out, the problem was fixed by updating to version 1.4.3 of the Avatax extension. The version in the marketplace was 1.1.3 and there was no indication of an update anywhere.
AbanteCart v1.4.3 is released.

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Show posts MenuQuote from: Basara on September 26, 2025, 08:50:43 AMHello.
Do your delivery methods in the Avatax extension have a proper Avalara tax code set?
Quote from: Basara on September 24, 2025, 01:56:44 AMHello
Please try clearing the AbanteCart cache first and then repeat the checkout process to see if the error appears again.
If it does, we'll need more details to help:
• The exact error message from the AbanteCart error log (not just the popup). -Nothing in the error log, that's part of my issue.
• A screenshot of the error on the checkout page.
• Your AbanteCart version. -1.4.1
• The theme name you are using. -Novator
• Whether this happens during guest checkout or registered customer checkout. -Don't allow guest checkout
• The delivery address details used during checkout. -Address doesn't seem to matter. Happened on a few different ones.
With this info, it will be easier to diagnose why the shipping methods are not showing.
Quote from: composedcrouton on April 19, 2025, 01:36:21 AM
You can fix the <br> showing as text in list view by modifying your theme's template to allow HTML rendering. If that's too complex, switching themes or adjusting the formatting method may help.