Preliminary expense disclosure requires itemised reporting of feasibility, project, survey and engineering costs with tax deduction details. Statement of preliminary expenses incurred by an assessee is required in prescribed form, with identification particulars, a declaration by the authorised signatory, and itemised details of expenses relating to feasibility reports, project reports, market surveys and engineering services. The form also requires information on who carried out the activity, the person paid or credited, PAN, amount, tax deduction at source, and the amount of tax deducted, together with prescribed instructions for name, address, status and currency entries.