Accounting service
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We prepare applications and systems for electronic tax invoices and receipts along two separate routes: digitally signed documents under Director-General Notice No. 15, which require the Director-General's approval first, and Time Stamp documents, which also require an application and published eligibility, under the Revenue Department notice that replaced the former e-Tax Invoice by Email regulation, which lapsed on 19 August.
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We prepare applications and systems for electronic tax invoices and receipts along two separate routes: digitally signed documents under Director-General Notice No. 15, which require the Director-General's approval first, and Time Stamp documents, which also require an application and published eligibility, under the Revenue Department notice that replaced the former e-Tax Invoice by Email regulation, which lapsed on 19 August 2022. Eligibility and channels for each route must be checked against the current notice. Scope can cover a certificate from a licensed provider, file templates and accounting-system integration as agreed. Request a quote from our staff.
Quote-based — Quoted per engagement · Depends on Revenue Department approval and systems to connect
If you handle it yourself
Incomplete records, an inapplicable rule or delayed approval can affect filing and tax payments. The issues below are review points for defining an engagement, not reports of any client's results.
Documents with an invalid digital signature can be rejected as input-VAT evidence by your customers.
How we prevent it: Check expiry and agree the renewal applicant, schedule and certificate payment responsibility; issuance depends on the certificate provider.
You fall out of compliance with the e-Tax Invoice rules and may be forced back to paper.
How we prevent it: Test supported transmission channels and agree acknowledgement checks and rejected-file handling; sending a file does not establish agency acceptance.
How it works
Assess ERP, POS, and current invoice formats.
Coordinate a licensed-provider certificate and prepare the Revenue Department approval request on the current form.
Build XML/PDF/A-3 templates and configure the signing service.
Test sample documents for each actual transaction type, then go live after approval.
Compare your options
| Aspect | Do it yourself | In-house staff | Work with us |
|---|---|---|---|
| Total annual cost | Looks free, but costs the owner's time and carries penalty risk | Assess actual payroll, employer contributions, software and cover arrangements rather than assuming one annual cost | Request a staff quotation that identifies scope and any additional items before agreement |
| Continuity | Stops the moment the owner gets busy | Staff turnover takes the institutional knowledge with them | Agree engagement owners, handover arrangements and traceable document storage |
| Review layer | Nobody double-checks | Self-review only, rarely an outside perspective | Preparer and reviewer within scope; audit work separately assigned to a CPA Partner (e-Tax Invoice) |
| When the Revenue Department calls | You attend and answer alone | In-house staff rarely have hearing experience | Prepare evidence and explanations within scope; attendance depends on authorization and taxpayer duties |
An adviser, not just a filer
Start with an initial discussion for a quotation, then agree topics, contact channels and follow-up frequency in writing. Additional work requires prior agreement; unlimited advice is not automatically included.
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FAQ
The former e-Tax Invoice by Email regulation lapsed on 19 August 2022. Today the routes are Time Stamp and approved digitally signed documents transmitted under the notice; business size or volume does not replace the notice's eligibility conditions.
It cuts paper, postage and storage; actual savings depend on volume and system cost, so model it per business.
Yes, where the chosen e-Tax provider or plugin supports it; we test output-VAT data before go-live.
It must be renewed before expiry or new documents cannot be signed; we track the date on the work calendar and remind you as agreed.
We prepare issuance reports and retained files — ordinarily kept five years from the relevant filing date, extendable by order to no more than seven — for explanations within the agreed scope.
The Time Stamp route covers tax invoices under the RD time-stamp notice, which took over from the old by-email rules after those ended on 19 August 2022, requiring an application and published eligibility first, then emailing the buyer and the time-stamp system in the same transaction. The digitally signed route under Director-General Notice No. 15 uses an electronic certificate, requires prior approval and also covers Section 105 receipts. Eligibility, any revenue limit and transmission cycles must be checked in the current notice, not chosen by volume or cost alone.
Under Section 87/3, files are ordinarily kept five years from the filing date of the relevant period, and an officer may order longer retention up to a total of seven years. Files must remain intact and their signature or time stamp verifiable throughout. Storage method and retrieval time are agreed in scope and do not assure an examination outcome.
These original sources address the issues described under each reference; they do not certify every statement or a service outcome. Check amendments and the conditions applicable to the entity's actual circumstances.
1. Notification
Director-General Notice No. 15: rules for electronic tax invoices and electronic receiptsThe Revenue Department
Defines an electronic receipt as one carrying a digital signature, issued by a Section 105 receipt issuer approved by the Director-General; Royal Gazette 6 December 2019.
2. Notification
Revenue Department notice on tax invoices by time stampThe Revenue Department
Covers tax invoices; the 2017 e-Tax Invoice by Email regulation lapsed when Ministerial Regulation No. 384 (2022) took effect on 19 August 2022.
3. Guidance
Revenue Department regulation on e-Tax Invoice by Email, B.E. 2560The Revenue Department
Historical regulation effective 1 March 2017. The Time Stamp notice states that it lapsed when Ministerial Regulation 384 took effect on 19 August 2022. Assess current duties under the replacement notice.
4. Guidance
e-Tax Invoice and e-Receipt systemThe Revenue Department
Rules for issuing, delivering and retaining electronic tax invoices, including digital signing.
5. Code
The Revenue CodeThe Revenue Department
The governing text for income tax, VAT, specific business tax and stamp duty, together with the ministerial regulations and departmental instructions issued under it.
Scoped source check, not whole-page certification:
Deep-dive knowledge on this subject
The questions clients actually raise on this kind of engagement, answered with the deadlines, paperwork and penalty figures attached.
Related services
Express, PEAK, Xero, QuickBooks — matched to your business, with POS/e-commerce integration.
View service detailsMonthly and annual return preparation, filing-calendar checks and submission evidence.
View service detailsReal engagements
Before retiring paper, pick a Revenue Department-accepted route that fits your volume, confirm electronic invoices carry every section 86/4 field, test credit notes, debit notes and cancellations, then run in parallel fo
What owners ask before deciding
Continue by what you need to do next
Open a filing guide if you are submitting yourself, or a definition if a document name is still unclear.
Related topic map
Authorities and terminology behind this page
These original sources address the issues described under each reference; they do not certify every statement or a service outcome. Check amendments and the conditions applicable to the entity's actual circumstances.
1. Guidance
e-Tax Invoice and e-Receipt systemThe Revenue Department
Rules for issuing, delivering and retaining electronic tax invoices, including digital signing.
2. Official system or form
Revenue Department e-Filing systemThe Revenue Department
The online filing and payment channel, including the extra days granted to electronic filers.
3. Code
The Revenue CodeThe Revenue Department
The governing text for income tax, VAT, specific business tax and stamp duty, together with the ministerial regulations and departmental instructions issued under it.
Initial consultation for a quotation via LINE, phone, or email.
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