> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.taxx.lu/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# What documents do I need for my tax return?

Here is a non-exhaustive list of documents to prepare in order to correctly complete your tax declaration, along with information on how to obtain them:

###### Regular Income

* **Annual salary certificates**
  Provided directly by your employer, usually in January or February.

* **Certificates of indemnity income (sickness, maternity, unemployment)**
  They are sent automatically via post or can be requested from the CNS, ADEM, or the relevant institution.

* **Pension certificates (CNAP, FNS, etc.)**
 They are sent automatically via post, and can be requested to the relevant institution.

* **Foreign income certificates**
  To be requested from the foreign employer or pension institution.

---

###### Social deductions and special expenses

* **Insurance certificates (liability, life, health, mutual, accident, etc.)**
  Sent annually by your insurance company.

* **Old-age provision insurance certificates (111bis, supplementary pension)**
  Issued by the insurer or the financial institution where the contract was taken out.

* **Home savings certificates**
  To be requested from a specialized institution approved such as BHW, Schwäbisch Hall, or Wüstenrot.

* **Certificates of interest paid on loans (personal or mortgage)**
Generally provided automatically by your bank on a tax document.

* **Donation certificates**
  Issued by approved associations, often automatically sent after the donation.

* **Invoices or attestations for childcare expenses**
  Provided by the nursery, daycare center, or childcare assistant.

* **Proofs for domestic help**
  To be provided as attestations from a service company or CCSS certificate if the person is employed privately.

* **Details of alimony payments made**
  Requires the judgment or agreement fixing the amount, accompanied by proof of payment (bank statements).

---

###### Specific or exceptional income

* **Rental income attestations**
  Provided by your property management agency or to be prepared by yourself if you manage the property directly. This includes rent received statements, invoices for deductible expenses, lease contracts, and any other documents justifying income and expenses related to the property.

* **Proof of income from capital (interest, dividends, capital gains)**
  Available from your bank or brokerage platform.