Tamar Arminak, an attorney for Bynes' mother, told People Magazine that the actress is out of the treatment center in Malibu.
"She's now looking at various colleges with the intention of majoring in fashion design," a statement from Arminak said. "She's mentioned before she's interested in creating a clothing line."
Arminak also said while the actress is out of the treatment facility, she will continue an outpatient program.
The 27-year-old "Hairspray" actress was first detained by police in July after she allegedly started a fire in a residential driveway in Thousand Oaks, her hometown.
She spent some time in the psychiatric wing of UCLA Medical Center, and then she was moved to a rehab facility in Malibu in August.
"Amanda and her entire family would like to thank everyone who's contacted them with good thoughts and wishes for Amanda's recovery," Arminak's statement continued. "Amanda has completed her inpatient rehabilitation and she's feeling better every day."
Lynn Bynes, the actress' mother, was granted a temporary conservatorship over the actress, but the case was dismissed because Amanda Bynes' care was being overseen by a mental health court.
ABC News contributed to this report.