GSTR-1 ATCopy Pageget https://api.sandbox.co.in/gst/compliance/tax-payer/gstrs/gstr-1/at/{year}/{month}Get advance tax (AT) details for a return period for the authenticated taxpayer. Path ParamsyearstringrequiredYear e.g. 2020monthstringrequiredMonth e.g. 01HeadersauthorizationstringrequiredTaxpayer access tokenx-api-keystringrequiredAPI key for identificationx-api-versionstringAPI versionResponse 200200Updated over 1 year ago