Carvalho now plays for Chinese Super League giants Shanghai SIGP.
The 39-year-old is unlikely to serve any jail time because, under Spanish law, sentences below two years for non-violent crimes when defendants do not have a previous conviction are typically viewed as suspended.
Former Portugal centre-back Carvalho accepted wrongdoing in front of the Audiencia Provincial de Madrid court, and repaid €545,981 in taxes due on image rights which had been kept away from Spain's Hacienda tax authorities via companies in the British Virgin Islands and Republic of Ireland.
His sentence was reduced because he returned the full amount and pleaded guilty to the charges against him, prosecutors had originally suggested a year in prison and a €300,000 fine.More news: Google Home will now be able to recognize users by voice
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He departed to rejoin Mourinho under the pristine spotlights of Real Madrid to add a La Liga title to his name in 2012.
Now easing into retirement in China, Blues fans will look back fondly at Ricardo Carvalho for his work on the pitch, despite his wrongdoings, playing the Chelsea way with grit and determination.
Real Madrid's top goal-scorer Cristiano Ronaldo attended a court hearing in July to answer allegations he avoided 14.7 million euros.
Monaco forward Radamel Falcao, Sporting Lisbon's Fabio Coentrao and Manchester United manager Jose Mourinho have also faced investigation by Spanish authorities for tax evasion while they lived in Spain.