Maximum marginal tax in case of trust

Respected Members,

For AY 2018-19, we had filed ITR-5 for various trusts.

The fourth character of PAN is T. For Ex. AAATA1111A

For most of these ITR's we had received intimation u/s 143(1), where department is charging tax @ MMR.

we had not mention % of share of members in ITR.

so can you please guide me if we had received these notice because we had not complied with the provisions of section 167B or there is any other reason of these notices.

Thank you.