Yes, that's what I thought too, but maybe it's only like that the second time. After all, I am not a tax professional and act according to my best conscience. Although it is also said that ignorance of the law is no excuse...
But anyway
Don't worry. You can declare any nonsense. The worst that can happen is that it gets crossed out. Next year you can declare the same nonsense again and at most it would be crossed out again. There is no penalty.
If you rent out and don't declare it, however, it's a different matter.
The AfA is finished and does not start anew in your case either, since it is considered an inherited acquisition for tax purposes with regard to Anlage V.
Then take that out of the current calculation right away. Better to calculate with the worst-case scenario than the more favorable one.
Now we would need some information from the OP and a tax expert.
What is the value of the compensation payment? Can the transfer be split into a paid and unpaid part? Since when has the apartment been owned by the "seller"?
What other information is needed?
Currently, I would calculate as follows
Cold rent income per year = €12,000
- Loan interest = €600
- Kitchen = €1,200
- Administration, the rent account, maintenance, trips to the property = "unknown" €
- Compensation payment = €3,600 (not yet sure if valid)
I used the money from the loan, for example, also for a new bathroom. Can I deduct the shower, bathtub, toilet, and also tiles? I assume flooring is not defined as depreciable for wear and tear?
What about electrics, is that valid under AfA?
Roof insulation?
I should be able to deduct "everything" because it fully adds to the value of the apartment, right?