I'm a man who quit work at 40, technically I still do work, but I only do the odd day when i want to of actual work, the rest of the time is just managing my property portfolio and business at arms length, I no longer need to be on hand if I don't want to be.
Now, fortunately for me I'm very happily married, so not on the dating scene, but if I was it would be a massive red flag if a woman started asking me about finances early on.
I have a good mate who, like me has jacked in the 9 to 5 having worked in the city, made a small fortune and invested well, he's single and dating, but his point of view is "look, i'm secure, I can afford what I want" and he's concerned the other way round, he wants the woman to be secure also - unfortunately there are gold diggers out there to watch out for.
So if you like this guy OP, I think you need to get to know him better before delving into his tax returns, or he might bolt!