There are 3 taxes applicable under GST : CGST, SGST & IGST.
- CGST: Collected by the Central Government on an intra-state sale (Eg: Within Maharashtra)
- SGST: Collected by the State Government on an intra-state sale (Eg: Within Maharashtra)
- IGST: Collected by the Central Government for inter-state sale (Eg: Maharashtra to Tamil Nadu)
In most cases, the tax structure under the new regime will be as follows:
| Transaction | New Regime | Old Regime | |
| Sale within the State | CGST + SGST | VAT + Central Excise/Service tax | Revenue will be shared equally between the Centre and the State |
| Sale to another State | IGST | Central Sales Tax + Excise/Service Tax | There will only be one type of tax (central) in case of inter-state sales. The Center will then share the IGST revenue based on the destination of goods. |
GST Returns
Prescribed Returns under the GST act along with their due dates are as follows:
| S.No | Return Form | Particulars | Person Responsible | Due Date |
| 1. | GSTR-1 | Details of outward supplies of taxable goods or services or both effected | Registered Person | 10th of Next Month |
| 2. | GSTR-2 | Details of inward supplies of taxable goods or services or both claiming input tax credit | Registered Person | After the 10th but before 15th of Next Month |
| 3 | GSTR-3 | Monthly return on the basis of finalization of details of outward supplies and inward supplies along with the payment of amount of tax | Registered Person | 20th of Next Month |
| 4 | GSTR-4 | Quarterly Return for compounding taxable persons | Taxable Person opting for Composition Levy | 18th from end of the Quarter |
| 5 | GSTR-5 | Return for Non-Resident foreign taxable persons | Non Resident Tax Payer | 20th from end of the month or within 7 days after the last day of validity of registration whichever is earlier |
| 6 | GSTR-6 | Input Service Distributor return | Input Service Distributor | 13th of Next Month |
| 7 | GSTR-7 | Return for authorities deducting tax at source | Tax Deductor | 10th of Next Month |
| 8 | GSTR-8 | Details of supplies effected through e-commerce operator and the amount of tax collected as required under sub-section (52) | E-Commerce Operator | 10th of Next Month |
| 9 | GSTR-9 | Annual Return | Registered Person | 31st December of Next Financial Year |
| 10 | GSTR-9A | Simplified Annual return by Compounding taxable persons registered under section 10 | Taxable Person whose registration has been surrendered and cancelled | 31st December of Next Financial Year |
| Note: Reference to GST council meetings, there have been happening various revisions and amendments in GST procedures including timelines for filing of the Returns. | ||||