How can I help with your taxes?

I'm grounded in a curated wiki of US federal, MA, NY, and NYC tax rules — current through 2026 (post-OBBBA). I'll cite the specific concept page or source for every claim. Click any wiki-link to open the source on the side.

Try one of these

Material here is study and reference, not formal tax advice. Verify figures against the cited primary source before filing.