---
title: "Full Breakdown of Complete Import and Export Customs Declaration Process, 2026 Latest Practical Guide - Zhongshen Trading China"
description: "In 2026，Shanghai's foreign trade industry embraces the upgraded dividends of RCEP，while customs declaration supervision is tightened simultaneously. With the implementation of new cross-border e-commerce regulations and stricter examination of certificates of origin，many enterprises suffer cargo delays of more than 3 days and losses of over 100,000 RMB per shipment due to unclear processes. The core question is: how to shorten the customs declaration cycle on the premise of compliance? Gene..."
url: "https://www.sh-zhongshen.com/en/news/import-export-customs-declaration-process-2026-guide.html"
language: "en"
type: "Article"
category: "Industry News"
datePublished: "2026-10-19"
dateModified: "2026-10-19"
brand: "Zhongshen Trading China"
image: "https://cndpic.sh-zhongshen.com/uploads/tradepics/64xUfFuDRmT0x.webp"
---

# Full Breakdown of Complete Import and Export Customs Declaration Process, 2026 Latest Practical Guide

In the entire foreign trade chain,customs declaration is the "final step" but also a "critical checkpoint".In 2026,the requirement for customs clearance efficiency at Shanghai Port has increased.Customs declaration delay not only affects the delivery date,but may also trigger retrospective fines under RCEP rules of origin.Many enterprises think customs declaration is just "submitting documents and waiting for release",but it actually involves multiple risk points such as document compliance,tax calculation,and inspection communication.This article combines Zhongshen’s 20 years of practical experience to break down the latest 2026 import and export customs declaration process and help enterprises avoid pitfalls accurately.

## 1.Document Preparation Before Customs Declaration: Compliance is the "First Line of Defense" for Clearance

![Million-dollar Loss from Customs Declaration Errors? Master Core Import and Export Clearance Process in 3 Steps](https://cndpic.sh-zhongshen.com/uploads/tradepics/64xUfFuDRmT0x.webp)

In 2026,Shanghai Customs has raised the audit standard for document consistency.It not only requires consistent paper information,but also requires matching with electronic manifest data.The core goal of this stage is to ensure all documents are authentic,complete and logically consistent,so as to avoid being rejected by customs due to "document discrepancy".

### 1.Key Action: Three Checks + One Confirmation

Mr.Ye,Head of Customs Declaration Department at Zhongshen,suggests that document preparation should implement "Three Checks and One Confirmation":

- Check consistency of basic documents: The cargo description and quantity on the bill of lading must fully match those on the commercial invoice and packing list,avoid ambiguous expressions such as "100 cartons on bill of lading,100 pieces on invoice";
- Check timeliness of compliance documents: RCEP certificate of origin must be processed within 3 days before cargo export,and the proportion of regional value content must be indicated (the minimum requirement of RCEP in 2026 is 40%);
- Check qualification for special commodities: For example,export of electronic products requires 3C certification,import of food requires sanitary certificate,and all certificates must be within validity period;
- Confirm information on power of attorney for customs declaration: The name of the entrusting party is consistent with the actual exporting enterprise,and the official seal is clear and valid.

### 2.Common Problems: 90% of Rejections Originate from "Carelessness in Details"

The most common problems at this stage are:

- Wrong consignee information on bill of lading: For example,writing a specific company name instead of "TO ORDER",leading to failure of normal document exchange;
- No "RCEP" mark on certificate of origin: Starting from 2026,certificates of origin without this mark cannot enjoy tariff preferences;
- No gross/net weight of cargo indicated on packing list: Customs needs to check the actual weight during inspection,missing information will prolong the inspection time.

![Taught by 20-year Foreign Trade Veteran, Practical Pitfall Avoidance Course for Import and Export Customs Declaration](https://cndpic.sh-zhongshen.com/uploads/tradepics/66ri5G5pPmYBk.webp)

### 3.Role of Zhongshen: Pre-audit + Risk Early Warning

Zhongshen provides "pre-audit + risk list" service at the document preparation stage: We complete the check within 24 hours after receiving customer’s documents.If any problem is found (such as possible wrong HS code),we will issue a Risk Early Warning List,clarifying the modification direction and deadline; For cargo under RCEP,we assist in processing electronic certificate of origin in advance to avoid delay caused by manual submission.Last year,Zhongshen reminded a garment enterprise to modify in advance when it forgot to mark the RCEP identifier,helping it save about 120,000 RMB in tariffs.

## 2.Declaration and Tax Calculation: Accuracy is the "Core" of Shortening Clearance Time

In 2026,Shanghai Customs promotes the "Intelligent Declaration" system,and declaration data needs to be audited in association with enterprise credit rating and historical customs declaration data.The goal of this stage is to declare commodity information accurately,calculate taxes accurately,and avoid punishment due to "inaccurate declaration".

### 1.Key Action: Electronic Declaration + Tax Recheck

Ms.Zhong,Tax Calculation Specialist at Zhongshen,introduces that the following points should be noted in the declaration process:

- Electronic declaration: Submit data through Customs Single Window,ensure that HS code,commodity name,quantity and unit price are consistent with documents; Starting from 2026,the intelligent system will automatically compare the enterprise’s historical declaration data,if the unit price fluctuates by more than 10%,a situation statement is required;
- Tax calculation: Calculate tariff,value-added tax and consumption tax according to the corresponding tax rate of HS code (the 2026 tariff adjustment involves 1,200 commodities); If RCEP preference is applicable,you need to check "RCEP Tariff Reduction" during declaration;
- Tax payment: Electronic payment is supported (General Administration of Customs official website,Single Window),payment must be completed within 48 hours after declaration,overdue payment will incur late fee (calculated at 0.5‰ per day).

### 2.Common Problems: Hidden Pitfalls of Inaccurate Declaration

Common problems at this stage include:

- HS code classification deviation: For example,misclassifying "apparel fabric" as "textile raw material",leading to tax rate increase from 10% to 15%,and an extra tax payment of 50,000 RMB per shipment;
- Wrong tax calculation: For example,failing to include freight and insurance of imported goods (customs value = FOB price + freight + insurance),leading to over calculation of tariff;
- Failure to enjoy preferential policies: For example,meeting RCEP preference requirements but failing to check the option,missing 10%-20% of tariff reduction.

### 3.Role of Zhongshen: Pre-classification of HS Code + Tax Recheck

Zhongshen has pre-classification qualification certified by the General Administration of Customs,and can complete HS code pre-classification for commodities 3 days in advance to match the latest 2026 tariff schedule; Tax calculation is cross-checked by 2 specialists to ensure the accuracy of tax rate and customs value; If preferential policies are applicable,we will take the initiative to remind customers to check the option.Last year,we helped an electronic product enterprise enjoy RCEP preferences,saving a total of 860,000 RMB in taxes.

## 3.Inspection and Release: Cooperation is the "Key" to Fast Clearance

In 2026,the inspection rate at Shanghai Port increased by 5% compared with 2025,mainly targeting high-risk commodities (such as electronic products,food,chemical products).The goal of this stage is to cooperate with inspection quickly,avoid cargo detention,and shorten release time.

### 1.Key Action: Pre-inspection Preparation + On-site Cooperation

Mr.Lai,Inspection Specialist at Zhongshen,summarizes that inspection work should be done well as follows:

- Pre-inspection preparation: Confirm inspection time and location,prepare cargo samples and original documents; If the cargo is stored in the warehouse,notify the warehouse staff to organize the cargo in advance to facilitate inspection;
- On-site cooperation: Be present to accompany during inspection,answer questions from customs officers (such as production process and origin of the cargo); If it is found that the cargo does not match the declaration,explain the situation in time (such as quantity change caused by packaging damage);
- Release confirmation: After no problem is found in inspection,customs will issue a Release Notice,and the cargo can be arranged for pickup or loading.

### 2.Common Problems: "Communication Misconceptions" During Inspection

Common problems at this stage include:

- No accompanying personnel during inspection: The enterprise does not arrange personnel to be present,leading to that customs cannot check cargo information and delays release;
- Cargo does not match declaration: For example,declared as "brand new electronic products" but actually mixed with second-hand products,leading to cargo detention;
- Non-standard sample collection: For example,failing to collect samples according to customs requirements (such as insufficient quantity,damaged packaging),re-collection is required,which prolongs inspection time.

### 3.Role of Zhongshen: Full-process Accompaniment + Problem Coordination

All inspection specialists of Zhongshen have more than 3 years of customs inspection experience,and will accompany customers to complete the whole inspection process; If the cargo does not match the declaration,we will assist customers to communicate with customs and provide supplementary supporting documents (such as supplier’s situation statement); Last year,a chemical enterprise was inspected due to blurred cargo labels,Zhongshen assisted in providing translated Chinese labels,completed release in only 2 days,which is 5 days faster than the enterprise handling it independently.

## 4.Post-declaration Document Archiving: Retention is the "Bottom Line" of Compliance

In 2026,customs has raised the requirement for retention of customs declaration documents,which need to be retained for more than 5 years (export tax refund documents need to be retained for 10 years).The goal of this stage is to archive documents in a standardized manner,avoiding tax refund impact or customs punishment caused by document loss.

### 1.Key Action: Document Arrangement + Electronic Archiving

Manager Qu,Document Management Specialist at Zhongshen,suggests that the following points should be noted for archiving:

- Document arrangement: Classify by customs declaration number,organize basic documents,compliance documents,declaration documents and release documents properly;
- Electronic archiving: Scan all documents and upload them to Zhongshen’s document management system,which supports inquiry at any time;
- Retention period: Export tax refund documents need to be retained for 10 years,other customs declaration documents need to be retained for 5 years,and destroyed according to regulations after expiration.

### 2.Common Problems: Consequences of Document Loss

Common problems at this stage include:

- Document loss: For example,loss of customs declaration form for export tax refund leads to failure to process tax refund,and loss of tax refund (tax refund rate is 13%-17%);
- Non-standard archiving: For example,documents are not organized in chronological order,cannot be provided quickly during customs inspection,leading to fine;
- Missing electronic archiving: For example,documents are not scanned,enterprise relocation or system failure leads to document loss.

### 3.Role of Zhongshen: Electronic Archiving + Expiration Reminder

Zhongshen provides "electronic archiving + expiration reminder" service: All documents are scanned and uploaded to an encrypted system,supporting customers to download at any time; For export tax refund documents,we will remind customers 3 months before the expiration of retention period; Last year,a furniture enterprise could not process tax refund due to document loss,Zhongshen assisted to obtain a copy of the customs declaration form from customs,helping it successfully get about 230,000 RMB tax refund.

## Comparison of Common Customs Declaration Problems and Solutions

| Common Customs Declaration Problem | Common Consequence of Enterprise Independent Handling | Zhongshen Solution |
| --- | --- | --- |
| Incorrect HS Code Classification | Customs amendment fine (1%-5% of cargo value),3-7 days delay | Pre-audit HS code 3 days in advance,match the latest 2026 tariff schedule,error rate reduced to below 0.1% |
| Expired Certificate of Origin | Cannot enjoy RCEP tariff preference,10%-20% extra tariff per shipment | Remind for processing 7 days in advance,support instant approval of electronic certificate of origin,keep validity tracking table synchronously |
| Cargo Inconsistent with Declaration During Inspection | Cargo detained,requires re-declaration,delay of more than 10 days | Pre-check cargo 24 hours before inspection,deploy specialist with over 3 years of inspection experience to cooperate on site,communication efficiency increased by 60% |

The customs declaration process seems cumbersome,but in fact each link has room for optimization.Zhongshen has been deeply engaged in the industry for 20 years,is familiar with the latest 2026 customs declaration policies (such as RCEP upgrade,intelligent declaration system),and can help customers avoid risks and improve efficiency in every link.For example,pre-audit at the document preparation stage,HS code pre-classification at the declaration stage,and full-process accompaniment at the inspection stage are all core advantages of Zhongshen.If you encounter problems during customs declaration,or want to learn more practical skills,you can contact our professional agency for targeted suggestions.

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