According to the latest government circular, business households are facing a major shift from the lump-sum tax regime to a declared tax regime. Instead of paying a fixed monthly tax, all sales transactions must now be recorded, e-invoices issued, and fully declared. This creates considerable difficulties for online shop owners, retailers, and business households who are accustomed to simple processes but now have to deal with a host of new tasks: issuing invoices for each order, tracking detailed revenue, adjusting invoices for returns, and ensuring accurate declarations to avoid legal risks.
This pressure is even greater for those selling across multiple channels – both offline in their stores, online on their websites, and on e-commerce platforms like Shopee, TikTok Shop, and Lazada. They have to manage hundreds of orders from various sources, track inventory for each channel, prepare goods for shippers, and simultaneously issue invoices for all these transactions. Manual processing is completely unfeasible, leading to missed orders, inaccurate data, and a significant waste of time – time that should be spent focusing on sales and business development.
GTG CRM was created to address precisely these challenges. It's not just a regular sales software, but a comprehensive management system that helps retailers automate most complex tasks – from consolidating orders from all channels into one place, managing centralized inventory, to automatically issuing e-invoices and supporting tax declarations. With GTG CRM, you will reduce administrative workload, avoid declaration errors, and have more time to focus on what matters most: selling and customer care.
What can GTG CRM do for sellers?
1. Consolidate orders from all channels in one place
Are you selling on Shopee, TikTok Shop, Lazada, Facebook, your own website, and also in your physical store? GTG CRM automatically synchronizes all orders from these channels into a single interface. No need to open 5-6 different tabs, no more missed orders or confusion between platforms.

2. Smart inventory management
GTG CRM allows you to create and manage multiple warehouses with detailed information: address, person in charge, contact phone number. This is where shippers will pick up goods, and the system will automatically update inventory after each shipment.

Each product is managed with a unique SKU. This is especially important when you sell on multiple platforms – if the SKU is the same, the system understands it's the same product, helping to accurately synchronize inventory across channels. You'll never oversell your available stock again.

3. Automatic e-invoice issuance - a solution for the new circular
This is the key feature that helps you comply with the new declared tax regulations. GTG CRM supports automatic invoice issuance for orders from Shopee, TikTok Shop, and Lazada right after you confirm the goods have been shipped. You no longer need to manually go into each platform to issue invoices.

Read more: Easier order management with GTG CRM features
4. Automatic invoice adjustments for returns
One of the most complex situations in declarations is when customers return items. For example, a customer buys 3 products but only keeps 2, returning 1. If done manually, you have to go into the e-invoice system, create an adjustment invoice, re-enter the figures – it's very easy to make mistakes and takes a lot of time.
GTG CRM automatically handles this task as well. When you update an order with returned items, the system will automatically generate an adjustment invoice with accurate figures and update the inventory. You don't need to do anything further.

Read more: Easier order management with GTG CRM features
Conclusion
GTG CRM is the perfect solution for all retailers, from those just starting out in online business to established shops selling across multiple channels. In an era of increasingly stringent tax regulations, having an automated sales management and invoicing system is not only a competitive advantage but also a necessary requirement for sustainable and lawful business operations. Let GTG CRM help you focus on what matters most: growing your business and taking care of your customers.
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