Form GSTR-3B is a monthly return that summarizes the details of outward and inward supplies, input tax credit, and tax liability.
Statement in Form GSTR-1 is a monthly or quarterly return that contains details of outward supplies made by the taxpayer.
Form GSTR-3B is filed by all registered taxpayers, while Statement in Form GSTR-1 is filed by taxpayers with an annual turnover of more than Rs. 1.5 crore.
Form GSTR-3B is due on the 20th of every month, while Statement in Form GSTR-1 is due on the 11th of the following month.
Form GSTR-3B is a summary return, while Statement in Form GSTR-1 is a detailed return.
Form GSTR-3B is used to calculate the tax liability for the month, while Statement in Form GSTR-1 is used to reconcile the details of outward supplies with the books of accounts.
Both Form GSTR-3B and Statement in Form GSTR-1 are important for GST compliance and must be filed on time.