Return invalid

aman tak (39 Points)

18 January 2020  
if i filed my return for a.y. 2012-13 and sent to the Bangalore for verification but due to any reason or whatever the reason the return have reached there or not and the return got invalid and due to some reason assessee could not get the information that his return has been got invalid and after that in 2019 the case selected in scrutiny and assessing officer made an assessment and determine the total income after some addition and added the interest under section 234
A, B and C for the period from A.y. 2012-13 to the year till the assessment got completed.
So my question is that interest which has been imposed by the assessing officer from A.Y. 2012-13 to till the assessment completed in year 2019 is valid or not??