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Filling in your tax return yourself: why use taxx.lu?
Filling it all in yourself? With taxx.lu, you answer simple questions and download your finished tax return, ready to send. Try it for free on taxx.lu.
“If I’m typing everything in myself anyway, why not just use the official form?” We hear this one a lot. Here’s the honest answer.
Form 100 is 20 pages of numbered boxes and tax vocabulary. Fair enough: it’s a legal document. But to fill it in alone, you need to know which box means what, which cap applies and which annex to attach.
With taxx.lu, you don’t fill in a form. You answer questions, in plain language. The moment you’re unsure, a real person answers. And at the end, you download your completed tax return, ready to send.
You stay in control. You just skip the painful bits: the jargon, the maths, the hunt for deductions and the checks after you’ve sent it.
The official form gives you boxes. taxx.lu gives you a co-pilot. Here’s what that actually changes.
1. Simple questions, not boxes to decode
No need to know what counts as “special expenses”. taxx.lu simply asks which insurance policies you pay for, and whether you have a loan or a pension plan. You answer, and the platform puts everything in the right box.
And the journey adapts to your life. Renting out a flat? Say so, and a step for your rental income appears. At the end, form 190 is generated automatically and downloads with your tax return (€59). No annex to hunt down, no box forgotten.
Every question comes with an explanation and real-life examples. No tax knowledge needed. If you can answer questions about your life, you can do your tax return.
Curious what it looks like? Watch our webinar on filing with taxx.lu.
2. A real team, at every step
This might be the biggest difference from tackling the form alone: you never get stuck.
A question about a box, a document, your situation? Click on the chat and someone from the taxx.lu team will answer. Prefer to write it all out in peace? Email works too. Before, during and after your tax return.
And in your language. The platform works in French, English and German. The team speaks all three, plus Luxembourgish and Portuguese.
Behind the chat, real people who know Luxembourg tax inside out. (4.9/5 on Google. We’re not saying it to show off. Well, maybe a little.)
An expert checks everything before you send it
With the Plus and Premium packs, a tax expert checks your data and calculations before you send. Something doesn’t add up? You’re told, and guided through the fix.
3. You type less than you think
Import your certificates and PDFs (salary, bank, insurance). AutoScan reads the amounts and pre-fills your answers. You go from “type everything” to “check and confirm”.
Keep an eye on what AutoScan has read
A huge time-saver, but not an autopilot. Foreign documents aren’t always recognised. A quick check, or a bit of manual entry, before you confirm, and you’re sorted.
4. You know your result before you send
Caps, legal limits, tax scales: they change with your age, your situation and your household. taxx.lu does the maths for you. And you see your tax estimate live, updating with every amount you enter.
A document turns up late? An amount to fix? Everything recalculates instantly.
Refund or extra to pay, you know what to expect before you even send it. You can plan ahead. No more suspense when you open the envelope. Why estimate before you file: three good reasons.
It’s an estimate based on what you’ve entered: the final result is set by the ACD. But this estimate has a second life. More on that in point 6.
5. The deductions you’d have missed on your own
This is where taxx.lu pays for itself. The platform spots the deductions you’d overlook and shows you, in black and white, where you’re leaving money on the table. Your Opti-Score tells you what to improve for next year. Every deduction worth knowing, right here.
A rough idea
On average, our clients get back €2,352. That’s not a promise: it’s an average. Your result depends on your situation, and the ACD alone decides.
6. Your estimate becomes your benchmark
The form on its own stops once it’s sent. With taxx.lu, your estimate keeps working for you.
When your tax assessment arrives, compare it with your taxx.lu result. Same amount? Perfect, you can breathe. A gap? It doesn’t necessarily mean there’s a mistake, but it’s worth checking: a deduction not applied, a different tax scale, an amount that doesn’t match. How to check your tax assessment.
If so, send your assessment to the team. With the Plus, Premium and Platinum packs, an expert analyses the gap and, if needed, drafts an appeal letter on your behalf.
The tax assessment check
It kicks in at your request, as soon as your assessment differs from your taxx.lu estimate. A safety net that can be worth hundreds of euros, and one the form alone doesn’t give you.
7. At the end, your tax return is ready (and next year is sorted too)
Once you’ve answered everything, you download your completed tax return as a PDF. Then you send it however you like: via MyGuichet if you have LuxTrust, by post, or by hand at your tax office. Find your tax office.
No LuxTrust? No problem. The whole taxx.lu journey works without it, with just an email address.
And next year? Tax rules change every year, and taxx.lu builds in the changes for you. Your documents stay safely archived, ready for your next tax return or a check. You can do it all from your computer, tablet or phone.
Married cross-border worker? We handle form 166 too
Form 166 is used to change your tax class or adjust your fixed withholding rate. For example, to request a rate corresponding to tax class 2 (conditions apply), or to adjust it when your income or your spouse’s changes. Here too, you answer the questions and taxx.lu fills in the form (from €59). The complete guide to form 166.
So, why taxx.lu?
Because “doing it yourself” and “doing it right” aren’t the same thing. You answer clear questions, a team is there at every step, and you walk away with your tax return ready to send. Before and after you send it, you’re never on your own.
Want a side-by-side comparison? Have a look at taxx.lu vs MyGuichet.lu.
And if you’d rather not fill in anything at all?
With the Platinum pack (from €290), our team prepares your tax return from A to Z. You fill in just one form on the Pricing page (the last one, we promise), send the documents we need, and we take care of the rest.
Ready to see the difference? Start your tax return on taxx.lu.
