Which parts of filing tax returns through the Revenue Department e-Filing system can IVC handle for you?
Short answer
Electronic tax invoices and receipts must follow the prescribed data format and be signed with a valid electronic certificate, then delivered to the buyer and reported to the Revenue Department within the published timeframe. Returns themselves are filed through the Revenue Department e-Filing system.
How this case runs end to end
Apply for the service and obtain the electronic certificate, configure the document format and numbering, run parallel testing before going live, issue and transmit documents within the timeframe, and monitor transmission results for rejected files.
Stage-by-stage timeline
| Stage | Work | Owner | Window |
|---|---|---|---|
| Preparation | Bookkeeping, computation and reconciliation to the ledger | IVC | Depends on volume |
| Review | Client review of the computation and the return before filing | Client and IVC | 1–3 working days |
| Filing | Submit through e-Filing or at the counter and retain the receipt | IVC | By the statutory deadline |
| Follow-up | Respond to any enquiry and archive the supporting file | IVC | As required |
| Scoping | Review the entity, period, filings due and current records | IVC | On enquiry |
| Document collection | Collect source documents, prior returns and statements | Client | 2–5 working days |
What to prepare
- Company affidavit, VAT certificate (PP.20) where issued, and the tax ID
- The accounting period and the filing deadline that applies to it
- Source documents: invoices, receipts, contracts and bank statements for the period
- Prior-period returns and the audited financial statements already filed
- Details of the authorised signatory and any e-Filing credentials in use
- For cross-border items: the counterparty's country and tax residence evidence
- A written authorisation where an agent files on the company's behalf
What "Which parts of filing tax returns through the Revenue Department e-Filing system can IVC handle for you?" actually involves
This question sits within e-Tax Invoice, e-Receipt and e-Filing. The authority or standard that governs it directly is the Revenue Department and the Electronic Transactions Development Agency, and every case is assessed against the rules in force on the day of submission. IVC prepares the file, checks internal consistency and coordinates with the receiving office; we are not a government body and we never guarantee how an authority will decide.
An expired electronic certificate stops signing and therefore stops issuance; renewal dates belong in the compliance calendar.
Transmission results should be monitored per batch; a file rejected by the system is not a document that was issued.
Records must remain retrievable for the statutory retention period in the electronic format in which they were issued.
Rules and requirements to settle before you start
Document numbering must remain unbroken across a system change, because gaps and duplicates both trigger enquiry.
e-Filing deadlines differ slightly from paper deadlines, and the electronic deadline governs once you are enrolled.
Refund claims routinely trigger a desk review, so the invoice and payment trail has to be assembled before the claim is filed.
A full-form tax invoice must carry the prescribed particulars; a missing item makes the input VAT non-creditable even when the payment is genuine.
The mistakes that cost the most time
The most expensive pattern is treating the deadline as the start of the work. Monthly VAT and withholding returns depend on documents that arrive from suppliers and customers, so a file assembled in the last three days is the file where a missing tax invoice becomes an irrecoverable input credit rather than a phone call.
The second is inconsistency between systems. The return, the input and output reports, the payroll register and the audited accounts are all read together on review, and a difference nobody can explain turns a routine desk check into a full enquiry covering earlier periods as well.
Why files are delayed or returned
- An expired electronic certificate
- Data format not matching the prescribed specification
- Duplicate or missing document numbers after a system migration
- Transmission after the published timeframe
- Tax invoices missing a prescribed particular
- A refund claimed before the supporting trail is complete
Key terms in e-Tax Invoice, e-Receipt and e-Filing
- PND.50 / PND.51
- The annual and half-year corporate income tax returns.
- PP.30
- The monthly VAT return, filed whether or not the period had activity.
- Permanent establishment
- A taxable presence in a country as defined by the applicable treaty article.
- DBD e-Filing
- The Department of Business Development system for submitting financial statements.
- Certificate of residence
- Evidence from a tax authority that a person or company is resident there for treaty purposes.
- Tax residence
- Status arising from presence in Thailand for 180 days or more in a calendar year.
- Input / output VAT
- VAT paid on purchases and charged on sales; the difference is remitted or carried forward.
Official sources
- The Revenue Department (Thailand) — Tax registration, returns and e-Filing
- Department of Business Development — Financial statement submission (e-Filing)
- Social Security Office (Thailand) — Employer registration and contributions
- Thailand Board of Investment — Investment promotion and tax privileges
- Electronic Transactions Development Agency — e-Tax Invoice and e-Receipt standards
Scope and limitations
IVC provides accounting, tax compliance and document services as a private firm. This page is general information, not a case-specific tax opinion, and it is not issued by the Revenue Department or any other authority. Rules and deadlines change, so confirm the position for your own period before acting. Fees are quoted after scoping — please contact our staff by phone, LINE or email.
Information as of August 2026
Other questions in this group
- What documents are required for e-Tax Invoice and e-Receipt?
- What is the step-by-step process for e-Tax Invoice and e-Receipt?
- How long does e-Tax Invoice and e-Receipt normally take?
- Which authority handles e-Tax Invoice and e-Receipt?
- What conditions must be met before e-Tax Invoice and e-Receipt?
- Why is e-Tax Invoice and e-Receipt most often rejected or returned?
- How far in advance should e-Tax Invoice and e-Receipt be arranged?
- Can someone else act on your behalf for e-Tax Invoice and e-Receipt, and what power of attorney is needed?
- What is most commonly overlooked in e-Tax Invoice and e-Receipt?
- Does e-Tax Invoice and e-Receipt require additional translation or certification?
- What happens if a document for e-Tax Invoice and e-Receipt is lost or expired?
- How does e-Tax Invoice and e-Receipt differ for foreign nationals compared with Thai nationals?
Need an answer for your own case? Talk to our staff by phone, LINE or email.