Anti is "you" (feminine) and anta is "you" (masculine)

(Anti) أَنْتِ is to address women. (Anta) أَنْتَ is to address men.

The vowel marks are above (fathaa) for male and below (kasra) for female. A quick explanation of vowels... https://www.madinaharabic.com/arabic-reading-course/lessons/L000_002.html