Generally, if you are a salaried employee, getting a credit card would be easier if you have pay slip for the last three months. Banks prefer customers from reputed companies because it makes KYC easier for them and they offer a lifetime free credit card along with opening a salary account and it easier for you even if you do not have a credit score or pay slip.
Secondly, if you are a self-employed individual, you can avail a secured credit card against a Fixed Deposit even if you do not have a credit score or ITR. You will be granted about 80% of the credit limit against the FD. This can be obtained by anyone who has an FD.