You can only deduct the share of your excess corresponding to the labour costs' share of the bill. You need to document that you have paid an excess.
Example: |
Total bill: | 50,000 |
Of which labour costs: | 20,000 |
Your excess: | 3,000 |
You may deduct: DKK 3,000 x DKK 20,000 /DKK 50,000 = | 1,200 |