Form 16 is your salary TDS certificate. If your income from salary for the financial year is more than the basic exemption limit of Rs 2.5 lakh, your employer will deduct TDS on your salary and deposit it with the government. If you have disclosed your income from other heads to your employer, he/she will consider your total income for TDS deduction.
Form 16A is also a TDS Certificate. While Form 16 is only for your salary, Form 16A is applicable for TDS on income other than salary. For example, Form 16A shall be issued to you when a bank deducts TDS on your interest income from fixed deposits, for TDS deducted on insurance commission, and for TDS deducted on your rent receipts.
