If this is not in an appropriate section, forgive me, hard enough to even post here atm.

https://bitcoin.tax/, anyone have experience with, especially from the US, using this site?  I'm looking for accuracy, gernal safety regarding my transactions ( I personally have nothing to hide, except as much as anyone can from the good ole IRS ), etc.?

I am considering that I might have to file for short-term capital gains this year, and plan ahead, if I do that, to claim long term next year.  Thoughts on using that site safely, for guidance in doing that?