Taxation and accounting

GST Returns Explained: GSTR-1, GSTR-3B and Deadlines

Confused by GST returns? Understand GSTR-1 and GSTR-3B, who files them, how often, and why filing on time matters for your business.

Taxation and accounting · 6 min read · Updated 2026-06-03

Why GST returns matter

Once you are registered under GST, filing returns is an ongoing obligation. Returns report your sales, purchases and tax to the government. Filing accurately and on time keeps you compliant, lets your customers claim input tax credit, and avoids interest, late fees and notices.

GSTR-1: your outward supplies

GSTR-1 reports the details of your sales, or outward supplies. The information you file here flows to your customers' records and affects the input tax credit they can claim, so accuracy matters for your business relationships, not just compliance.

GSTR-3B: your summary return

GSTR-3B is a summary return where you declare your total sales, input tax credit and the tax payable. This is generally where the actual tax payment is made. It must reconcile with your detailed filings.

Monthly or quarterly filing

Depending on your turnover and the scheme you opt for, returns may be filed monthly or quarterly. Smaller taxpayers may be eligible for quarterly filing with monthly payment. Choosing the right option keeps compliance manageable.

The cost of filing late

Late filing attracts interest on the tax due and late fees per return, and repeated delays can lead to notices or restrictions. Staying on schedule is far cheaper than catching up later.

Because due dates and rules can change, it helps to have a partner tracking them for you.

How Aidwish helps

Aidwish handles your GST returns end to end — preparing GSTR-1 and GSTR-3B, reconciling input tax credit, filing on time and managing any notices — so GST never becomes a last-minute scramble.

FAQ

Questions, answered

What is the difference between GSTR-1 and GSTR-3B?

GSTR-1 reports detailed sales, while GSTR-3B is a summary return where tax is generally paid.

Can I file GST returns quarterly?

Smaller taxpayers may be eligible for quarterly filing with monthly payment, depending on turnover and scheme.

What happens if I file GST returns late?

Late filing attracts interest and late fees, and repeated delays can lead to notices.

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