Filing a correct income tax return before the due date is the simplest way to claim your income tax refund. You can check the total advance tax payments on Form 26AS while filing your return. The assessment officer must be satisfied with the form's income tax calculation after filing your income tax return. If your advance tax payment balance under Form 26AS exceeds your tax liability under the filed ITR, there is a chance the officer might approve your tax refund. Alternatively, you can also file Form 30 to ask for a review of your income tax payments in relation to your liability. Keep in mind that if you provide your bank account information for direct transfer, you will receive your income tax refunds faster.