Will #Taxes Update Automatically After #Address Change?

Yes, When a #customer changes their billing or #shipping address, the Magento 2 GST #extension recalculates applicable #GST automatically. The tax #split adjusts between SGST/CGST or #IGST based on the new location, ensuring #accurate tax on the final order total without manual recalculation.

https://store.webkul.com/magento2-gst-extension.html