How much am I going to earn this year? 
You need to have an idea of how much you are going to earn (before labour market contributions) before taxes this year. 

Example
You start your job in March, which means you have a salary for ten months (March-December). You earn DKK 25,000 a month before taxes. 

Caculation:

DKK 25,000 x 10 (months) = DKK 250,000

Write DKK 250,000 in field 201.

If you have had an income from for example a student job before you started working full time you have to add that amount to the DKK 250,000.