This document shows that donations to WikiDC are federally tax deductible from 2021-02-15 to the end of 2022. Earlier donations back to 2014 are also federally tax deductible; see Category:Tax. Category:Tax
Some orgs will require this form from WikiDC before paying us or giving us a donation or honorarium. It needs to be signed and dated when given to the recipient, theoretically by Peter, although this may not matter given that it only has public information.