Hello,
Thanks for using our theme.
I do not see the difference in mentioned browsers – https://prnt.sc/rBvDuKF0Svv6 Please clear cache and check one more time.
Provide us with screenshots.
Lightshot Screenshot tool https://app.prntscr.com/en/index.html makes screenshots and generates links then you can provide links of screenshots here. Or you can upload ready screenshots into your media library and provide us with URLs.
VAT functionality comes from WooCommerce plugin, there are no additional settings for this from our theme side, so contact the support of WooCommerce also.
Regards