I've done very well with detaching and not pursuing.
Please be careful as these are two VERY different things. And they are both very important!
Could you elaborate? I see detaching as not letting my thoughts or wants regarding my W impact what I do. That I'll be OK no matter what happens. Just focus on myself, my life, what I want to do, and whatever happens regarding her will sort itself out. I can't control it.
Not pursuing I see as not reaching out. Going dark, basically. Regarding the taxes I could have offered her to come over to the house to do them together like I had mentioned a couple weeks ago, but I didn't. And when she does next come to the house, no talks on R or the MR or anything of the sort. Really just nothing from me at all except friendly courtesy. Our anniversary is next week -- not planning on acknowledging it with her.