Communication plays a key role in interpersonal relationships. A child who has communication problems usually has social and behavior problems that interfere with learning.
Even though your daughter does not have the ability to speak, she has not lost the desire and need to communicate.
The IEP team is required to consider your daughter's communication needs. The goal is to increase her ability to communicate. She needs direction instruction in a mode of communication. A speech therapist may work with an occupational therapist to improve her ability to communicate.
Since you daughter cannot speak, the IEP team must also consider her needs for assistive technology. The team should schedule an assistive technology evaluation to identify her needs and how to meet these needs.
She may benefit from low-tech devices like picture boards, head pointers, and switches to activate a computer program. She may need high-tech devices like voice output devices and a computer so she can access the general education curriculum.