Work a flat-pack assembler can help with
Wardrobes
Describe what is there now, what you want changed and any photos, so quotes cover the same scope.
Beds
Mention the size, access and any deadlines so tradespeople can price the job accurately.
Cabinets
Say what finish or standard you expect and whether materials are included.
Office furniture
Add anything that could affect the work, such as parking, pets or working hours.