Sales Management Software with E-invoicing from POS Systems

Sales management software with e-invoicing initiated from POS terminals is a comprehensive management platform for retail businesses, restaurants, cafes, and convenience stores. This solution integrates sales, inventory management, revenue calculation, and legally compliant e-invoice generation in Vietnam — all running on a single POS terminal, reducing investment costs and operational complexity.

##What is sales management software and why do businesses need it?

Sales management software is a software system running on a POS terminal that helps record sales transactions, manage inventory, calculate revenue, and automatically issue e-invoices. Businesses need this solution to speed up payments, reduce data entry errors, comply with legal requirements for e-invoices, and obtain real-time business data for decision-making.

According to Việt POS's experience deploying at 200+ retail points, restaurants, and cafes nationwide, businesses using sales management software integrated with e-invoicing often achieve:

• Reduced customer checkout time by 30-50% (from 2-3 minutes to 1-1.5 minutes).
• Reduced invoice data entry errors by 80-90% thanks to automation.
• Increased inventory accuracy from 60-70% to 95%+.
• Saved 1-2 accounting personnel per month.

##What legal requirements must sales management software meet?

Sales management software that issues e-invoices must comply with Decree 123/2020/ND-CP (regulating e-invoices) and Circular 78/2021/TT-BTC (detailed guidance). Key requirements: invoices must have digital signatures, QR codes, complete sales information, and secure storage as regulated.

Specifically, the software needs to meet:

• E-invoices with digital signatures: Each invoice must be signed with a digital certificate (according to the Law on Electronic Transactions), making it impossible to forge.
• QR codes and mandatory information: Invoices must contain a QR code, amount, product code, customer name (if applicable).
• Data storage: The software must store invoices on a secure server, with the ability to retrieve and audit.
• Tax reports: Automatically summarize revenue, VAT, and income tax for submission to tax authorities.

Việt POS provides sales management software licensed for e-invoicing by the Ministry of Finance, 100% compliant with the above regulations.

##Which POS terminal is suitable for running sales management software?

A suitable POS terminal must have a minimum configuration: Intel Core i3 CPU or higher, 4GB RAM, 128GB SSD, 15-17 inch touchscreen, and network connectivity support (Ethernet/WiFi). Popular models: Sunmi T2 L1521/L1522, ZPOS 1563, Easy 664, ZPOS Core i5gen8.

Comparison of popular POS terminal models:

Model	CPU	RAM/SSD	Screen	Reference Price	Suitable for
Sunmi T2 L1521	Intel Celeron	4GB/128GB	1 screen 15.6 inch	12-15 million	Small stores, cafes, restaurants
Sunmi T2 L1522	Intel Celeron	4GB/128GB	2 screens (15.6 + 7 inch)	15-18 million	Restaurants, medium-sized stores
ZPOS 1563 Core i3	Intel Core i3	4GB/128GB	1 screen 15.6 inch	14-17 million	Retail stores, small supermarkets
ZPOS 1563 Core i5	Intel Core i5	8GB/256GB	1 screen 15.6 inch	18-22 million	Supermarkets, large retail stores
Easy 664 Core i5	Intel Core i5	4GB/128GB	1 screen 15.6 inch	16-20 million	Retail stores, high-end restaurants

The choice depends on the store's scale, number of daily transactions, and required software features. Small stores (10-20 transactions/day) can use Sunmi T2 L1521; large stores (100+ transactions/day) should use ZPOS Core i5 or Easy 664 Core i5.

##What are the main features of sales management software?

Sales management software integrated with e-invoicing typically includes: sales management (POS), inventory management, customer management, revenue reporting, payment integration, e-invoice generation, employee management, and business data analysis.

• Sales Management (POS): Records product sales, calculates payments, prints invoices, supports multiple payment methods (cash, card, e-wallet).
• Inventory Management: Tracks product quantities, alerts for low stock, calculates cost of goods, supports inventory in/out.
• Customer Management: Stores customer information, purchase history, supports loyalty programs.
• E-invoice Generation: Automatically generates invoices with digital signatures, QR codes, and sends emails to customers.
• Revenue Reporting: Summarizes daily/monthly/yearly revenue, analyzes best-selling products, and profit.
• Payment Integration: Connects with payment gateways (Momo, Zalopay, VNPay, bank cards).
• Employee Management: Records work shifts, sales performance, and commissions per employee.

##How much does it cost to implement sales management software?

The cost of implementing sales management software with e-invoicing typically includes: POS terminal (12-22 million VND), software (5-15 million VND), peripheral equipment (printer, scanner, cash drawer: 3-8 million VND), installation and training (2-5 million VND). Totaling 22-50 million VND depending on scale.

Detailed costs for different scales:

• Small store (1 counter): 22-30 million VND — Sunmi T2 L1521 machine, basic software, printer, training.
• Medium store (2-3 counters): 35-45 million VND — ZPOS 1563 Core i3 machine, professional software, 2-3 printers, advanced inventory management.
• Supermarket, large store (4+ counters): 45-50 million VND+ — ZPOS Core i5 or Easy 664 machine, enterprise software, camera integration, system-wide inventory management.

Việt POS provides a comprehensive implementation package including: free survey, software installation, staff training, 12-24 month warranty, 24/7 technical support.

##How to choose suitable sales management software?

Choose sales management software based on: store scale (number of counters, daily transactions), business industry (retail, restaurant, cafe), required features (e-invoicing, inventory, customer management), integration capabilities (payment, camera, RFID), and post-sales technical support.

Selection process:

1. Identify needs: List mandatory features (e-invoicing, inventory, customer management) and optional features (camera, RFID, payment integration).
2. Compare providers: Check a list of reputable software providers, review current customer feedback, compare prices and support services.
3. Request a demo: Providers should offer a free demo or trial for you to check the interface, features, and processing speed.
4. Check legal compliance: Ensure the software complies with Decree 123/2020 and Circular 78/2021, and has an e-invoice licensing certificate from the Ministry of Finance.
5. Evaluate technical support: Check response time, training quality, warranty, and post-sales support.
6. Test and sign contract: Test the software for 1-2 weeks, then sign the official implementation contract.

##Next Steps — Sales Management Software Solution Consulting

Việt POS technical team provides free surveys of store scale, management needs, and consults on suitable software + POS terminal configurations. Contact main hotline 0905 295 337 or the nearest offices:

• Smart Retail Solution — Việt POS
• POS Terminal Product Category for Retail Stores
• Overall Sales Management Solution
• Contact 4 offices in HCM/DN/CT/HN