Introduction
The Pay and Accounts Office (PAO)/ District Treasury Office (DTO)/ Cheque Drawing and Disbursing Office (CDDO) are required to file Form No. 137 as per Income Tax Act 2025. In case of an office of the Government, where tax has been paid to the credit of Central Government without the production of a challan associated with deposit of the tax in a bank, the PAO / CDDO / DTO is required to file Form No. 137. For filing Form No. 137 each PAO / CDDO / DTO is required to have an AIN. AIN is the identification of the PAO / CDDO / DTO for the purpose of filing Form No. 137. It is mandatory for each PAO / CDDO / DTO to have an AIN.
How to Apply
- Application for AIN has to be made in the form ‘Application for allotment of Accounts Office Identification Number’ (AIN application form).
- The application has to be made in physical form as per guidelines provided with the AIN application form.
Where to get the physical application forms
- The application form can be downloaded from the Income Tax Department website ( www.incometaxindia.gov.in ) or the TIN website tinpan.proteantech.in or from the office of the Income Tax Department.
- The duly filled and signed application for AIN allotment is to be submitted in physical form to the jurisdictional CIT (TDS).
- The details of the CIT (TDS) are available on the TIN website ( tinpan.proteantech.in )
Allotment of AIN
- Complete and correct AIN application forms submitted by the PAO / CDDO / DTO will be forwarded to Protean eGov Technologies Limited (Protean ) by the CIT (TDS) recommending allotment of AIN to the PAO / CDDO / DTO.
- On allotment of AIN, the same will be communicated vide e-mail/ letter will be sent to the PAO / CDDO / DTO at the email ID/ communication address mentioned in the AIN allotment form.
Download of AIN application
PAO/CDDO/DTO who do not have a AIN can apply for one by submitting a duly filled and signed AIN application form to jurisdictional