consultation desk; inquiry counter; help desk
A service point where people can seek advice, information, or assistance on a specific topic, such as at a government office, company, or support center.
A new childcare consultation desk has been set up at the city hall.
If you have any problems, please contact the inquiry counter first.
窓口 is a general counter or window for transactions; 相談窓口 specifically adds the nuance of consultation or advice.
相談所 is a consultation office or center, often a dedicated facility; 相談窓口 can be a desk or counter within a larger organization.
Compound of 相談 (consultation) and 窓口 (window, counter).