ITR filing

For one of my friend, linkage of Adhaar and PAN is not happening, as there is Date of Birth and name mismatch. Now change in Adhaar seems to be taking time (90 days written on their website). My query is:

1. Can we file ITR without linking PAN and Adhaar.

2. Or else Can ITR be filed manually (income above 5 lacs).

Whats the way-out as due date for return for 2018-19 is Mar20.