Key takeaways
Registering for tax in a market starts a filing obligation that repeats for as long as you stay registered, on that market’s schedule and in its format.
A tax return is only as good as the records behind it. You have to be able to show what you charged, on what, and where your customer was.
Reporting is moving from a form submitted at quarter end to data the tax authority receives directly.
By the time you are registered for tax in a market, charging the right rate, and issuing invoices that meet local rules, the hard part is supposed to be behind you. However, what follows is an obligation that repeats, on that market's schedule, in that market's format, backed by records that market expects you to produce on request.
The expectations are rising. Most major markets are focused on less paper, more data, and less time between the sale and the report. What used to be a form you submitted after the quarter closed is becoming data a tax authority expects while the quarter is still running.
Where filing sits in the chain
Entering a market triggers a short sequence. First, you register once you cross that market’s threshold. Then, you charge what that market says to charge. And finally, you issue invoices in the form it requires. You handle each of those once, then you maintain it.
Filing is the one that never finishes. Every period you submit a tax return for that market, declaring what tax you charged your customers and paying over what you collected. It comes back every month or quarter, in every market you are registered in, for as long as you stay registered there.
It is also when earlier mistakes surface. The return has to agree with what you charged on every invoice issued that period, so a wrong rate or a sale booked to the wrong market turns up here.
Here is a high-level overview of what filing looks like in the United States, the European Union, the United Kingdom, and Asia Pacific, and the records a tax authority can ask you to produce.
How filing works in the EU
Each member state sets its own return frequency and its own deadlines. Hold registrations in four of them and you are running four calendars, not one.
An EU scheme called the One Stop Shop narrows that for one category of sales. For cross-border sales to consumers in other member states, you can register in a single country, file one quarterly return and make one payment, with the amounts broken out by country of consumption and passed on by the country you filed in. It does not cover sales to businesses, and it does not replace a domestic return in a country where you hold a local registration.
How filing works in the UK
The distinctive requirement in the UK is not what you file but how. Under Making Tax Digital, every VAT-registered business has had to keep its VAT records digitally and file through compatible software since April 2022. Where numbers move between systems, they have to move digitally. HMRC is explicit that copying and pasting between spreadsheets does not count, and filing without compatible software can cost up to GBP 400 a return.
It is worth understanding even if the UK is not on your list, because it is a working preview of where other markets are heading.
How filing works in Australia and Singapore
These are two common first stops in APAC, and neither stands in for the region, because India, Japan, and others each run something different.
Australia reports on a business activity statement. Quarterly is the default, with returns due on 28 October, 28 February, 28 April, and 28 July. At AUD 20 million of GST turnover and above, reporting moves to monthly and the statement is due on the 21st.
Singapore runs a three-month accounting period, with the return and the payment both due one month after it ends. Miss it and SGD 200 applies immediately, with another SGD 200 for every month it stays outstanding, up to SGD 10,000 on a single return.
How filing works in the US
There is no federal return, because there is no federal sales tax. Every state you are registered in sets its own frequency, its own due dates, and its own form. Frequency often depends on how much you sell there, so a state can move you from quarterly to monthly filing as your sales in that state grow.
The practical effect is that the US is not one entry on your filing calendar. It is as many entries as you have registrations, each with its own dates.
What has to sit behind the return
A return is a summary. The records are what prove it is accurate. That means keeping:
the invoices you issued and received
evidence of where your customer was when the sale happened
the rate you applied, and why you applied it
anything you relied on to charge less or nothing, such as an exemption certificate or a reverse charge
How long you keep all of it is set locally as well.
Sales sit in one system, invoices in another, tax rates in a third, and the return gets assembled from exports at the end of the period. That holds up until a tax authority asks you to trace a single line on a return back to the transaction behind it.
Where reporting is heading
The format is changing faster than the obligation. More authorities want the data digitally, structured the way they specify, and sooner after the sale.
The UK already requires digital records and digital links between systems. In the EU, the reason is stated plainly: the European Commission measured the VAT compliance gap at €128 billion for 2023, and VAT in the Digital Age moves cross-border business sales to near real-time reporting from July 2030. This is not the same as filing a return. The tax authority receives transaction data rather than a periodic summary you prepared.
That is the argument for treating records as a by-product of how you bill rather than a project you run four times a year. A quarter-end reconciliation can produce a correct return. It cannot produce transaction data a tax authority expects to receive within days of the sale.
How Airwallex Billing helps businesses stay ready to file
Airwallex Billing automatically calculates and applies the correct tax at the point of billing, so what was charged, to whom, where, and at what rate is recorded as the sale happens rather than reconstructed at the end of the period. Invoicing, subscriptions, and checkout all run through the same workflow, which keeps the detail behind a return in one place instead of spread across exports. Most tax tools sit on top of a payment provider, whereas with Airwallex, tax is built directly into the billing workflow. Learn more about Airwallex Billing.
Frequently asked questions
How often do you have to file?
It depends on the market, and often on your size. Singapore runs a three-month accounting period. Australia is quarterly below AUD 20 million of GST turnover and monthly at or above it. EU member states each set their own frequency, and in the US every state you register in sets its own.
Can one return cover sales in several countries?
Sometimes. The EU's One Stop Shop lets you report cross-border sales to consumers across member states on a single quarterly return filed in one country. It does not extend to sales to businesses, to domestic sales where you hold a local registration, or to anything outside the EU. Everywhere else, each registration means its own return.
What records have to sit behind a return?
The invoices you issued and received, evidence of where your customer was, the rate you applied and why, and anything you relied on to charge less or nothing, such as an exemption certificate or a reverse charge. Retention periods are set locally and do not match each other, so your archiving policy is set by the strictest market you sell into.
Do you still have to file if you had no sales in the period?
Usually yes. The obligation comes from being registered, not from selling. Most markets expect a return showing nothing to declare rather than silence, and the EU's One Stop Shop requires a nil return for a quarter with no qualifying sales.
What happens if you file late?
Most markets apply a penalty for the late return and interest on anything paid late, and the two are separate. Singapore charges SGD 200 the day a return is overdue and another SGD 200 for each month it stays outstanding, up to SGD 10,000 on a single return. Repeated late filing can also change how closely a tax authority looks at you.
Is digital reporting the same as filing a return?
No, and the difference matters. A return is a periodic summary you prepare and submit. Digital reporting sends transaction-level data to the tax authority, usually close to the time of the sale. The UK's Making Tax Digital is still a return, filed through software. The EU's move from July 2030 is reporting. Markets are adding the second without removing the first.
Sources
European Commission, Mind the Gap report. https://taxation-customs.ec.europa.eu/taxation/vat/fight-against-vat-fraud/mind-gap-report_en
European Commission, Declare and pay in OSS. https://vat-one-stop-shop.ec.europa.eu/one-stop-shop/declare-and-pay-oss_en
European Commission, VAT in the Digital Age (ViDA). https://taxation-customs.ec.europa.eu/taxation/vat/vat-digital-age-vida_en
GOV.UK, VAT Notice 700/22: Making Tax Digital for VAT. https://www.gov.uk/government/publications/vat-notice-70022-making-tax-digital-for-vat/vat-notice-70022-making-tax-digital-for-vat
Australian Taxation Office, Quarterly GST reporting. https://www.ato.gov.au/businesses-and-organisations/gst-excise-and-indirect-taxes/gst/lodging-your-bas-or-annual-gst-return/options-for-reporting-and-paying-gst/quarterly-gst-reporting
Australian Taxation Office, Monthly GST reporting. https://www.ato.gov.au/businesses-and-organisations/gst-excise-and-indirect-taxes/gst/lodging-your-bas-or-annual-gst-return/options-for-reporting-and-paying-gst/monthly-gst-reporting
Inland Revenue Authority of Singapore, GST filing due dates and requests for extension. https://www.iras.gov.sg/taxes/goods-services-tax-(gst)/filing-gst/due-dates-and-requests-for-extension
Disclaimer: This article is for general informational purposes only and does not constitute tax or legal advice. Tax laws and regulations vary by jurisdiction and may change over time. Businesses should consult a qualified tax professional to determine their specific tax obligations.
The Airwallex Editorial Team
Airwallex’s Editorial Team is a global collective of business finance and fintech writers based in Australia, Asia, North America, and Europe. With deep expertise spanning finance, technology, payments, startups, and SMEs, the team collaborates closely with experts, including the Airwallex Product team and industry leaders to produce this content.
