If the Mandal is a trust Registered under sections 12A/12AA
1) If the trust has obtained registration u/s 12A/12AA the following income shall not be includible in the total income –
i. Income derived from the property held under trust for charitable or religious purposes to the extent
a) It is applied for such purposes in India.
b) It is accumulated and set apart for application up to 15% of such income. (11)(1)(a)
2) The Corpus donations are exempt.
3) The assessee trust may also accumulate income for a specific purpose for a period of 5 years if,
--A specific notice to that effect is given to the assessing officer.
-- The money so accumulated is invested or deposited in any of the modes specified u/s 11(5) (section 11(2)).
4) Income tax will be charged separately on Anonymous Donations in addition to other income
1) @ 30% on the aggregate of anonymous donations received in excess of the higher of the following, namely:
a) 5% of total donations received by the assessee; or
b) One lakh rupees, and
Normally, the Trust will be liable to tax at the rate applicable to individuals or Association of Persons considering the normal slab.
However, if the income is taxed on account of section 13(1)(c) or S. 13(1)(d), being attracted then in that event, the relevant income would be taxed at the maximum marginal rate.
5) In case, the delay occurs in filing of the return and the Trust does not have reasonable cause for the delay, then in that case, the Trust will be liable for a penalty of Rs. 100/- per day for every day of the default. {Section 272A(2)(e)}.
6) ITR 7 should be used.
For details please refer to the GUIDANCE NOTE ON AUDIT OF PUBLIC CHARITABLE INSTITUTIONS UNDER THE INCOME-TAX ACT, 1961 by the ICAI.
see link https://wirc-icai.org/wirc_referencer/income%20tax%20&%20wealth%20tax/Taxation%20of%20Charitable%20Organisations.htm