My bank doesn't know whether a deposit came from a long- or short-term capital gain. (You may think that you've covered that with "brokerage" but there are lot

My bank doesn't know whether a deposit came from a long- or short-term capital gain. (You may think that you've covered that with "brokerage" but there are lots of property types where there's no third party that knows the purchase date.) Said deposit may even be tax-irrelevant. And then there's crypto...