Important dates for those filing a sole trader tax return in 2026
We have listed important dates and useful links for anyone who needs to submit a tax return for a sole proprietorship, also known as a sole trader business.
Important dates:
1 Mars
Last day to get a digital mailbox if you are going to receive the declaration digitally.
2–6 Mars
You will receive your income tax return to your digital mailbox.
6 Mars
The declaration is available as a pdf on My Pages on the Swedish Tax Agency's website. This also applies to those who do not have a digital mailbox.
17 Mars
The online declaration opens. You who have e-identification can log in to the Income Declaration 1 e-service.
17 Mars–15 April
The paper declaration is sent to your home. If you do not have a digital mailbox, you will receive your paper declaration by post.
31 Mars
Last day to approve the declaration online without changes or additions to get a refund in April.
7–10 April
Money is paid out to you who approved your taxes online by March 31.
4 May
Last day to do your taxes. The exception is if you, or your accounting firm, have delayed submitting the declaration.
12 May
If you report VAT once a year, this is the last day to submit the VAT return.
1 June
Last day to declare for those who have delayed submitting the declaration.
9–12 June
A tax refund may come for those who declared by May 4 at the latest.
15 June
Last day to declare if you have a delay in submitting the declaration through your accounting firm.
14 September
The back tax must be paid if you received your notice of final tax in June.
12 November
The back tax must be paid if you received your notice of final tax in August.
12 Mars 2027
The back tax must be paid if you received your notice of final tax in December.
More about important dates for your taxes at the Swedish Tax Agency (in Swedish)
Checklist and other support at the Swedish Tax Agency
At skatteverket.se, there is a checklist if you are unsure of the steps to go through in order to submit your income tax return together with the NE attachment.
Income tax returns for sole traders at the Swedish Tax Agency