The 27-year-old star was forcibly hospitalised following a driveway-burning incident in July, but was eventually moved to a Malibu rehabilitation facility, reported People magazine.
"Amanda and her entire family would like to thank everyone who's contacted them with good thoughts and wishes for Amanda's recovery. Amanda has completed her inpatient rehabilitation and she's feeling better every day," a statement from lawyer Tamar Arminak said.
"She's now looking at various colleges with the intention of majoring in fashion design. She's mentioned before she's interested in creating a clothing line.
Bynes' mother Lynn will remain in indefinite control over her well-being and finances.