For Account type = Ledger and main account is having posting type = Sales tax, why we cannot use the item tax group and sales tax group to have the tax calculated

This could lead to confusion as 99% of the uses will think that the tax will be calculated based on the transaction amount and not taking the whole amount as sales tax


to be consistent / same way as Account type = Vendor / Customer


For account type = ledger (with main account having posting sales tax) the sales tax code is mandatory. Again, if we select the sales tax code, the whole transaction amount will be taken as calculated sales tax.