I'm due to start maternity leave on October 31st. The company just announced my store will be closing. What are my rights regarding my paid maternity leave? They have also offered me a severance package,can they force me to take one or the other

I'm due to start maternity leave on October 31st. The company just announced my store will be closing. What are my rights regarding my paid maternity leave? They have also offered me a severance package,can they force me to take one or the other or should it be in addition to maternity leave benefits?