You can link the two by visiting the income tax e-filing portal. There are two ways – either without logging in to your account or by registering/logging in to your account.
In a landmark judgement, SC today updheld Constitutional validity of Aadhaar but with riders. SC has given a list of services where linkage of Aadhaar is mandatory and where it is not.
Know where your Aadhaar number is mandatory, where not
Aadhaar Verdict: Supreme Court upholds constitutional validity; UIDAI mandatory for IT returns
The tech titan said it will "work towards fixing this in an upcoming release of SetUp wizard which will be made available to OEMs over the next few weeks".