The announcement comes a week after Real Madrid's Portuguese star Cristiano Ronaldo was accused of evading 14.7 million euros in tax through offshore companies.
"To this date, neither the Spanish tax authorities, nor the public prosecutor have contacted Jose Mourinho or his advisers who were hired for the inspection process", the statement from Gestifute Media read.
And finally, they accuse him of "voluntarily" refusing to include 28.4 million euros in income linked to the sale of his image rights for the 2015 to 2020 period to a Spanish company.More news: Fabinho Says He's "Tempted" By Idea of Moving to Manchester United
"From now on it will be the judge in charge of the case who will take the necessary steps to determine the possible responsibilities of Mr Mourinho".
Prosecutors accuse the Portugal worldwide of evading tax via a shell company based in the British Virgin Islands and another in Ireland, known for its low corporate tax rate.
Ronaldo will be staying at Real Madrid and no offer has been received to tempt him away, club president Florentino Perez insisted on Tuesday.
"Ronaldo is a Real player and will continue to be so as far as we are concerned", Perez told Marca on Tuesday. They say that in 2010, Ronaldo set up a company to manage his image rights in the British Virgin Islands but then transferred those rights to a second company in Ireland, exclusively for the objective of creating a "screen" to confuse Spanish tax authorities.More news: Somalia turns down $80m to cut ties with Qatar
Last year, Barcelona forward Lionel Messi and his father Jorge were found guilty of tax evasion on the Argentina international's image rights, with more than 4m euros (£3.52m) owed in back payments.
Other prominent football figures have been accused of tax fraud in Spain in recent months.
Both were given 21-month jail sentences, though neither is expected to serve the time as it was a first offence and the sentence was under two years.
Former Barca defender Javier Mascherano also agreed a one-year suspended sentence with authorities for tax fraud last year.More news: ABC reporter: My sources tell me Bob Mueller isn't investigating Trump (yet)
- Which Analysts Are Watching United Utilities Group PLC (UUGRY)?
- Johnson & Johnson (JNJ) EPS Estimated At $1.78
- UK seeks to reassure EU citizens they can stay after Brexit
- Cavs owner, Billups meet about front-office job
- List of demands on Qatar by Saudi Arabia, other Arab nations
- PS4 Pro Competes With Xbox One S, Not Xbox One X
- Sixers like Fultz first, Lakers eye Ball as draft looms
- Senate GOP health bill: Cut Medicaid, end no-coverage fines
- Turkey rejects call to shut military base in Qatar
- Scotland Yard mull manslaughter charges over Grenfell Tower blaze