As per Lawkidunya, To obtain a National Tax Number (NTN) in Pakistan, the following documents are typically required:

Documents Required For Individuals:

1. Computerized National Identity Card (CNIC): A valid CNIC is mandatory for NTN registration.
2. Proof of Address: A utility bill (e.g., electricity, gas, or water) or a rent agreement with a valid address.
3. Bank Account Details: A bank account number and branch code (for tax refund purposes).

Documents Required For Businesses:

1. Business Registration Certificate: A registration certificate from the relevant authorities (e.g., SECP, Chamber of Commerce).
2. Partnership Deed (for partnerships): A partnership deed or agreement.
3. Memorandum and Articles of Association (for companies): A copy of the company’s Memorandum and Articles of Association.
4. Proof of Business Address: A utility bill or rent agreement with a valid business address.
5. Bank Account Details: A bank account number and branch code (for tax refund purposes).

Documents Required For Association of Persons (AOPs) and Trusts:

1. Deed of Trust or Partnership Deed: A copy of the trust deed or partnership deed.
2. Registration Certificate: A registration certificate from the relevant authorities.
3. Proof of Address: A utility bill or rent agreement with a valid address.

Additional Requirements:

1. Filled NTN Application Form: A completed NTN application form (available on the FBR website).
2. Photocopy of CNIC: A photocopy of the CNIC (for individuals).
3. Authority Letter: An authority letter (in case of businesses or AOPs/trusts).

Submission:

The required documents can be submitted online through the Federal Board of Revenue (FBR) website or in-person at an FBR office.

Please note that the required documents may vary depending on the specific circumstances of the applicant. It’s recommended to consult with a tax professional or FBR representative to ensure all necessary documents are submitted.