Hello @mintal
The price on your store and the price on the feed should be the same to avoid price mismatch issues. So, if you have added price to the regular price field with tax then our plugin will also get the same price from WooCommrece.
So, in short, if you have already included the tax to the regular price then you can’t remove the tax from the price on the feed as it will generate price missmatch issue.
Thank you,