Income tax Form 16 is your salary TDS certificate issued under section 203 of the INCOME TAX Act for tax deducted from salary.
Form 16A is also a TDS Certificate but it is applicable for TDS on income other than Salary.
If your income from salary for the financial year is more than the minimum exemption limit of 2.5 Lakhs, your employer is required to deduct TDS on your salary and deposit this amount to the government. You should receive your Form 16 latest by May 31 of the subsequent year. For eg Form 16 for FY 2015-16 should be received latest by May 31, 2016.
Whereas Form 16A will be issued to you when a bank deducts TDS on your interest income from fixed deposits, savings bank account interest, capital gains if any or any other income you receive on which TDS has to be deducted.
You can also disclose your other incomes to your employer and he will consider your total income for TDS deduction. If the total income is below the minimum exemption limit your employer will not deduct any TDS. If you have worked with more than 1 employer in a financial year, you will have more than one Form 16.
Form 16A also has details of name and address of deductee/deductor, PAN & TAN details, challan details of TDS deposited. It is also has the details of income you have earned and the TDS deducted and deposited on such incomes.
Form 16 certificate has two parts – Part A and Part B. Part A has information of the employer and employee. Details like name, address, PAN, TAN, period of employment, details of TDS deducted etc. Part B includes details of salary paid, other incomes, tax payable etc.
You can check the TDS deducted details in your Form 26AS or even in your pay slips. If there are any discrepancies you can contact your employer to make corrections.
Hope you find above information useful. Do share your views/queries below as comments.