According to Trump's latest indictment (i have included the hyperlink to the pdf here), he faces 78 criminal charges.
Former Assistant US Attorney Sarah Krissoff stated that the Department of Justice would seek a substantial sentence if there is a conviction against former President Donald Trump due to the nature and duration of the alleged conduct, as well as the involvement of others allegedly working at Trump's direction.
The sentence, if convicted, would depend on the judge, likely Trump-appointee Aileen Cannon in the Southern District of Florida. In relation to the January 6 charges, Trump could face a maximum of five to 20 years of prison time.
However, he has pleaded not guilty to all three cases. Despite the legal challenges, Trump has portrayed himself as a victim of political persecution and baselessly accused his political rivals of interfering with his potential candidacy for the presidency in 2024. His next hearing in the January 6 probe is scheduled for August 28.