A GST Return is a detailed statement that captures all the financial transactions of a person registered under GST, reflecting revenues and expenditures. It is a mandatory submission for every holder of GSTIN to the tax authorities, allowing them to determine the net tax liability with precision.

• Purchases: It records in detail the purchases the taxpayer has made.
• Sales: It provides a comprehensive log of the taxpayer's sales activities.
• Output GST (On Sales): It notes the GST charged on the taxpayer's sales.
• Input Tax Credit (GST Paid on Purchases): It lists the GST paid on purchases, which is eligible to be deducted from the GST owed on sales.

GST returns must be filed by any business or individual registered under the GST regime. This obligation applies to entities whose annual aggregate turnover surpasses the specified threshold, which is set by the tax authorities and may differ for various classifications of taxpayers, such as standard taxpayers and those opting for the composition scheme.

GSTR-1 is the mandatory return for businesses to detail their outward supplies of goods and services. This encompasses all sales-related invoices and adjustment notes for the given tax period. Every regular taxpayer under GST, including those classified as casual taxable persons, is obligated to file GSTR-1.

• Monthly: Due on the 11th of the subsequent month for businesses whose yearly turnover exceeds Rs. 5 crore or for those not enrolled in the QRMP scheme.
• Quarterly: Due on the 13th of the month after the quarter's end for businesses participating in the QRMP scheme.

GSTR-2A is a dynamic, read-only return for the recipients or purchasers of goods and services, capturing details of all incoming supplies from registered GST vendors within a tax period. The information in GSTR-2A is filled automatically from the GSTR-1 returns of suppliers and the Invoice Furnishing Facility (IFF) data for those in the QRMP scheme.

Introduced in August 2020, GSTR-2B is a static read-only return that provides consistent ITC information sourced from the previous month's GSTR-1 filings. It supports purchasers in matching their ITC claims for each tax period, advising on necessary actions for each listed invoice, including any need for reversals, ineligibility, or application of the reverse charge.

GSTR-2, an editable return, is presently deferred and was meant for registered purchasers to declare their inward supply of goods and services for a tax period. Initially planned to be auto-filled from GSTR-2A, its filing has been on hold since September 2017.

GSTR-3, a suspended monthly summary return for regular taxpayers, compiled concise figures of both outward and inward supplies, input tax credits, tax liabilities, and tax payments. It was automatically generated from GSTR-1 and GSTR-2 filings but has been deferred since September 2017.

GSTR-3B, a monthly summary declaration for normal taxpayers, summarizes outward supplies, input tax credits, and tax dues. Before submitting GSTR-3B, it is critical to reconcile sales and ITC details with GSTR-1 and GSTR-2B records.

• Monthly: Due by the 20th of the month following the reporting month for taxpayers with an annual turnover above Rs. 5 crore.
• Quarterly: Due by the 22nd of the month following the quarter for 'X' category states and by the 24th for 'Y' category states for taxpayers with a turnover of up to Rs. 5 crore in the QRMP scheme.

GSTR-4 is the yearly return for those under the Composition Scheme, due by April 30th of the subsequent financial year. GSTR-4 has replaced the prior quarterly submissions, with taxpayers now submitting a simplified challan via Form CMP-08 by the 18th following each quarter's end Under the Composition Scheme, businesses with goods turnover up to Rs. 1.5 crores may pay tax at a predetermined rate on their turnover. Service providers with a turnover of up to Rs. 50 lakh can opt for a similar benefit

GSTR-5, required by non-resident foreign taxpayers engaged in business in India, details their outward and inward transactions, adjustments, tax liabilities, and payments, with submissions due by the 20th of each month

GSTR-5A is the monthly summary for providers of Online Information and Database Access or Retrieval Services, due by the 20th of every month.

Input Service Distributors must file GSTR-6 monthly, reporting the ITC received and allocated, including detailed documentation related to the distribution of credits, by the 13th of each month.

Entities must deduct TDS under GST file GSTR-7 monthly, documenting TDS deducted, due and paid amounts, and any TDS refunds, with filings due by the 10th of the subsequent month.

E-commerce operators under GST must submit GSTR-8 monthly, recording the supplies made and tax collected at source, due by the 10th of the following month.

All GST-registered taxpayers must file GSTR-9 annually, summarizing their outward and inward supply details, taxes due, and paid. The due date is December 31st of the year after the