GST return is a document that will contain all the details of your sales, purchases, tax collected on sales (output tax), and tax paid on purchases (input tax). Once you file GST returns, you will need to pay the resulting tax liability (money that you owe the government). Individuals who have exceeded the prescribed limit of Rs. 40 lakhs (for goods) and Rs. 20 lakhs (for services) must obtain a GST registration and file GST returns regularly. In addition, individuals engaged in the inter-state supply of goods or services must obtain a GST registration and file returns.