How to Choose an Import and Export Customs Declaration Company? Key Points for Picking a Reliable Agent

3 Core Stages of Import and Export Customs Declaration and the Role of Agents

Many foreign trade practitioners in Shanghai have told me recently that there are more policy changes in the customs declaration process in 2026 than in previous years -- for example,adjustments to the details of cross-border e-commerce list declaration,and updates to the tariff schedule for some mechanical and electrical products.Their biggest headache is not the number of orders,but the frequent stuck points in customs declaration: wrong document filling requires rework,uncleared goods after arriving at the port incur daily storage fees,and even delivery delays due to inspection caused by incomplete documentation.Today,we will break down the core customs declaration procedures to see how much trouble a reliable agent can save you.

Stage 1: Document Preparation and Verification (Goal: Ensure complete and compliant documentation)

The core of this stage is "consistent documentation and no missing elements".When many enterprises handle it on their own,common mistakes include: choosing the wrong type of certificate of origin (for example,mixing up GSP Form A and general certificate of origin),inconsistent invoice amount with the contract,and mismatched weight on the packing list with the actual goods.These small mistakes,at best,lead to customs return and rework,and at worst,affect the priority of inspection.

The document team led by General Manager Sun of Zhongshen has a special checklist -- newly added cross-border e-commerce declaration elements in 2026 (such as product traceability code and consumption attribute labeling) are marked in advance.Previously,a customer selling household goods had their goods temporarily detained by customs after arriving at the port because they missed the "fumigation certificate for wooden packaging".General Sun contacted the fumigation agency to issue the supplementary certificate on the same day,and coordinated with customs for expedited review.In the end,the delay was only 1 day,3 days less than if the customer handled it on their own.

Stage 2: Declaration and Inspection (Goal: Pass customs review smoothly)

The key to the declaration stage is "accurate electronic data and smooth on-site coordination".In 2026,customs implemented the "Smart Inspection" system,where some goods are directly compared with declaration elements through AI scanning,but if the goods do not match the declaration (such as wrong model number,overreported quantity),they will still be inspected manually.Inspection takes 1 day at the shortest,3 to 5 days at the longest.If you miss the shipping schedule,you have to amend the bill of lading,which adds a lot of costs.

Manager Du of Zhongshen has more than 15 years of experience working with customs.He knows which products are prone to random inspection (such as food and electronic products) and will conduct risk assessment in advance: for example,for samples sent by customers,he will first check whether the labels comply with the new 2026 Chinese label regulations to avoid on-site rectification.Previously,a customer producing photovoltaic modules had a deviation between the declared "module power" and the actual value.Manager Du explained to customs in advance that it was "model update not synchronized in time",and provided the manufacturer’s update certificate.In the end,only a simple inspection was conducted,and the shipping schedule was not delayed.

Stage 3: Release and Follow-up (Goal: Smooth shipment/entry of goods)

This stage seems simple,but actually hides "hidden costs": wrong tariff calculation leads to overpayment,lost release slip affects goods pickup,and incomplete tax refund documentation requires multiple trips to the tax bureau.Many enterprises do not know how to apply for the 2026 tariff reduction and exemption policies for some products (such as new energy products),resulting in unnecessary cost losses.

The tax accounting team led by Manager Wan of Zhongshen uses the latest tariff calculator and will proactively check "whether the goods are eligible for reduction and exemption policies".Previously,a lithium battery customer benefited from the 2026 tariff cut for lithium batteries from 10% to 5%.Manager Wan proactively selected the exemption option during declaration,saving the customer nearly 20,000 yuan in taxes and fees.In addition,they will organize tax refund documents (customs declaration form,VAT invoice,contract) into an exclusive ledger,and remind customers to submit 3 days before the deadline to avoid missing the tax refund window.

Self-Declared Customs vs Zhongshen Agency Customs Declaration: Comparison of Advantages and Disadvantages

5 Common Customs Declaration Problems and Solutions in 2026

• Missing elements in cross-border e-commerce list declaration → Zhongshen’s document team verifies all elements in advance (including traceability code,consumption attributes) to avoid declaration return
• Unaware of timely updates to tariff schedule → Manager Du updates the policy library weekly,and proactively reminds customers of products eligible for reduction and exemption policies
• Goods labels do not meet requirements during inspection → Conduct label review in advance to avoid time delays caused by on-site rectification
• Failed electronic document upload → Equipped with a dedicated system connected to customs,upload success rate over 99%
• Late submission of tax refund documents → Establish an exclusive ledger,remind customers to submit 3 days before the deadline to ensure tax refund is received on time

After years of working in foreign trade,I have seen many enterprises lose customer orders due to problems in the customs declaration process.In fact,customs declaration is not just "following procedures",but a comprehensive capability of "understanding rules,being familiar with policies,and having connections".Zhongshen has been deeply engaged in the industry for more than 20 years,with dedicated staff for each link -- General Sun is in charge of documents,Manager Du is in charge of customs liaison,Manager Wan is in charge of tax accounting.Customers do not need to run around themselves to get customs declaration done.

For foreign trade practitioners in Shanghai,if you have encountered problems in customs declaration recently,you may wish to talk to Manager Du of Zhongshen -- after all,they have helped many peers solve customs clearance problems,and the saved time and costs can be used to take more orders.