In 2 Samuel 3:2-5 are listed sons born to David in Hebron. In 1 Chronicles 3:4-9 the sons of David born in Jerusalem are listed. Only one daughter is named but it doesn’t mean that David only had one daughter. In fact in the following Scripture, it says there were daughters (plural).
2 Sam 5:13
After he left Hebron, David took more concubines and wives in Jerusalem, and more sons and daughters were born to him.

With as many wives and concubines that David had, there surely were several daughters.
Since Tamar is listed as the sister of Absalom, they must have had the same mother. Tamar was the half-sister of Amnon. Amnon raped Tamar which led to the murder of Amnon by Absalom's men.

Even though David had some bloodthirsty offspring, one was singled out for some great things...Solomon.