My husband’s six-year-old daughter from previous marriage has not accepted me even after one year of marriage. Any tips to make her open up to me?

She must be having vivid memories of her mom if she has lived with her. And if not even then you area new entry to the home. Probably she must have become insecure. Till now she was the sole person whom her father would be giving attention to, and since you have come, she must be sharing that attention. And I hope she hasn't heard any stories of princesses with step moms! She is just 6-year-old, and must be confused insecure dealing with this new development in her life. Give her time. First try to become her friend. Engage in activities with her. Go on picnics. Don't make her feel or do anything in front of her that would make her feel that her father loves you more than her. Let the friendship between you and her grow gradually. Let it take its own time and don't hurry into it. Eventually, with time, she will accept you. There's long time ahead, she would need 'mother's love' the most with each passing day. And your love and care will make her trust you and love you. Discuss with your husband and he will help your bonding grow with her.