As @Anonymous has linked to the response from the moderator, that's the best one, and although it takes a bit of time to get, you can ask for the entire year for taxes at once (ie in January, ask for "all of 2018" (in 2019)).
As @Bell3 has mentioned the POS, you may be able to buy vouchers locally which will provide you with a receipt at payment, and the retailer 'should' have an option to remove the taxes as required.
I think the drawback on the receipts is that Public Mobile doesn't have their information fully available on a voucher receipt.
