New GST Registration for two entity

This discussion explores whether Company A, an IT firm, can use its existing GST registration for its new e-commerce portal, 'B', which is in its incubation stage. The user is seeking advice on whether 'B' can be listed as a sister firm under Company A's GST and bank details, or if a separate GSTIN is required, especially if the trade names differ. The query also touches upon TDS implications and best practices for tax calculation.