You should go to a few countries and see how the world operates. Stores can include all taxes in the quoted price upfront before the sale, as many countries embed the taxes in the price shown publicly, and then the store takes privacy coin payment like monero, and if the store does not record a few sales to skip on taxes since there’s no payment account tied to company name, even better

Stores should accept monero to eliminate paying taxes

Due to the fact that Taler is designed for government to see all income means it’s not an option. Is there any privately owned company anywhere in the world that uses Taler?

Given government’s attitude that all money everywhere belong’s to the government, they only decide on how much to let the worthless servants get to use, I’m good with tax evasion. When I carry cash at stores, it’s fine if they don’t report the income. Government is very good at taking money by force, but not as interested to pay for anything. It is in store’s best interest to accept privacy coins like Monero or Zcash before using something like Taler