inquiry desk; information counter
A service counter where customers or visitors can ask questions, get information, or make inquiries.
I asked about the train schedule at the station's information counter.
For questions about the product, please contact this inquiry desk.
受付 is a general reception desk, often for registration or initial contact, while 問い合わせ窓口 specifically handles inquiries and information.
案内所 is a guidance or information center, often larger or more permanent, while 問い合わせ窓口 can be a simple counter or desk.
Standard full kanji spelling.
Variant with 合せ instead of 合わせ.
Variant without い.
Compound of 問い合わせ (inquiry) + 窓口 (counter, window).