As per Section 15 of the Income Tax Act,1961 clarifies the year of chargeability of salary. Salary is taxable on due or receipt basis which ever is earlier. Salary due in previous year is taxable even if not received.
In the present case, first you mentioned that salary is not received but in fourth line you have mentioned that salary is received. Assuming that salary is not received i give my views as follows
Firstly you should not have filed the return if form 16 is not available. You should have checked online for TDS deduction. But since you have done so :
1. If you have already received notice then you cannot file revise return.
2. You can approach the concerned IT officer regarding your query and if he gives time then you need to approach the employer and insist him to file TDS returns and see that the TDS is duly reflected in your form 26AS online. Since as per Income Tax Office if the TDS is reflected online in Form 26AS then only they can give credit for the TDS paid.
3. Third option is to pay the tax and try to recover the tax from employer.
Since you have already filed return on due basis your income is taxable.
Regards