Acknowledgments of return not showing

As per your saying you're showing acknowledgement no but not acknowledgement copy
go to portal
dashboard
view income tax return
choose which one you want to see
submit
you find acknowledgement number
click on that number
you find the copy
download

regarding aadhar and pan link
when ever we try to link it and it not linked we get a mail in our mail id regarding where's the problem is just check it
or see both pan and aadhar card you're
and find the error and retify it
and then link

Yes I got almost all the time unsuccessful of linking as they said some of the information don't match ..
as even before I told client to rectify AADHAR CARD according to PAN but when he update such information there were already match but at IT site I was not matched .
what next I have to do?
please forward me.

Then check with database of incometax or aadhar as you saying it's rejected by incometax so check it's database information 

Sometimes in shot name person details is written in full spelling wise in income tax database segment check that how they fill up form and change aadhar as per it