Income tax query

Ajnas (Student) (844 Points)

18 December 2020  
GST input receivable (Unclamied input accounted in the books)as on 31-3-2019 Rs. 300000, subsequent year such input is not claimed, this input receivable is charged to next year p&l as expense
Question 1. this expense is prior period item?
Question 2.This expense is disallowed as prior period expense or not?
Question 3.it is required to disclose in 3ca/3cb3cd in Clause 27(b)?