From February 2022, it will be possible to fill in the income tax return (form 100) using an electronic assistant on the MyGuichet.lu platform. To do so, you must have:
This new procedure is, under certain conditions, aimed at residents or non-residents:
This secure procedure is:
The declarant, or both declarants in the event of joint taxation, must sign the electronic tax return.
You can attach the required supporting documents to your tax return by using the MyGuichet.lu application to photograph them with your smartphone and then upload them.
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