Which bin for sofas and armchairs?
Usual answer in the UK
Special Special collection or specialist disposal
Book your council's bulky waste collection, take it to the tip, or offer it to a furniture reuse charity.
Also possible: Household waste recycling centre (the tip).
How to prepare it
Upholstered seating can contain persistent chemicals and some councils handle it separately, so tell them what it is when you book.
Does every council do this?
Most councils follow the answer above, but bins and sorting rules are set locally, and a few councils still do things differently. If your bin has a sticker, or your council sent a leaflet, follow that. Enter your postcode to go straight to your council's guidance.