A Tasmanian woman who caused the death of her four-year-old daughter through negligent driving will serve one month in prison.

Tamara Brooke Whitford, 36, has been sentenced on eight charges.

Her daughter Molly died in a car crash at New Norfolk in November 2014.

Three 14 year olds and Whitford's 10-year-old son were also in the car.

Whitford was driving unlicensed, knew the car she had borrowed had bald tyres, and also knew the car did not have enough restraints for her five passengers.

She lost control of the car on a left-hand bend on Boyer Road at New Norfolk. It then slid 35 metres before hitting an embankment and flipping.

Her son and daughter were thrown from the car and Molly died a short time later.

Tests at the time showed Whitford had a blood alcohol reading of 0.065 and traces of THC — the active ingredient of cannabis.

She was also driving on a suspended and expired licence.

History of driving without a licence

The court heard Whitford had been convicted 10 times of unlicensed driving and had only ever held a learner's licence.

Magistrate Sam Mollard said, at the time of the accident, she was driving to the risk of others' safety.

He said whatever caused Whitford to lose control of the car, it was a situation an untrained driver was ill-equipped to deal with.

"She has suffered grievously as a result of her negligence," Magistrate Mollard said.

"I know she will suffer for the rest of her life but I do observe the defendant is not the only one who is suffering."

He said Molly would be mourned by her father, siblings and other family members, and the wider community as a whole was poorer for her death.

The court previously heard Whitford knew there were more passengers than restraints in the vehicle.

She also knew Molly had climbed free of her restraint but thought one of the other children would do something about it.

Whitford was supported by about 20 family members in court, several of whom cried as the sentence was read out.

As Whitford was taken into custody, family members stood and called out: "We love you, Tammy."

"Chin up Tammy," another called out.

She was ordered to serve at least one month in jail and was disqualified for holding or obtaining a licence for at least 18 months.