Pc parts off the tax?

If I go to work for a laptop / PC, I can deduct as far as I know from the tax. Is that synonymous with PC parts if I want to build a PC myself?

Yes, sure. You can deduct them from the tax

Basically it is irretrievable whether single parts or completely PC.

The prerequisites must be correct then you can claim this as an advertising cost (I guess?).

Are you independent? To what percentage is this used for work?

Employees always ask themselves why the employer does not provide one.

In principle, however, PC / laptop or parts thereof can also be a cost for employees.

Self-employed and I would say 90%.

Then it should not be an issue to write off over 3 years.