From: Rabbi Moshe Sofer
To: Rabbi Sinai
Multiple questions are addressed: a seeming contradiction in Rashi about the age for the half-shekel obligation, difficulties regarding the omer offering and chadash prohibition in the wilderness, and whether a chazzan may recite shehecheyanu at both synagogue kiddush and at home.
Source: Shu"t Chasam Sofer OC §143