To say 'I have a desk' in Spanish, you would say 'Tengo un escritorio.'
If you want to say the teacher's desk in spanish you would say el escritorio.
The Spanish words for "student desk" are, "escritorio de estudiante." Pupitre de estudiante
'Desk' in Spanish is 'escritorio.' It depends on what kind of desk. A large desk, such as a teacher or businessman might have would be called an "escritorio" as mentioned above. A smaller desk, such as a High Schooler would sit at is called a "pupitre" or "banco" depending on the country.
escritorio
Escritorio is a desk. This usually refers to a school desk or working desk. If you want to say table, you can say "mesa".
Help desk is: mesa de consulta.
Hay un pupitre
La mesa marron.
What I would say, if I really wanted to speak normal and fluent English, is that there are four pens on my desk.
un escritorio/pupitre una carpeta
the laptop is on top of the desk