Who was the Royal Princess of Sweden in 1990? (Not 2019) I think Sweden has 2 or 3 Princesses. Names?

Crown Princess Victoria and Princess Madeleine are the daughters of King Carl XVI Gustaf. Victoria was born 14 July 1977, and Madeline was 10 June 1982.

King Carl has a son,Prince Carl Philip, Duke of Värmland (born 13 May 1979).

Carl is a grandparent, now. His children are married, with families of their own.

https://en.wikipedia.org/wiki/Carl_XVI_Gustaf_of_S...

The King has sisters:

Princess Birgitta

    Princess Désirée    Princess Christina

    Princess Margaretha

    There was also Marianne Bernadotte --princess through marriage to the King's paternal uncle Sigvard Bernadotte (1907–2002), and, by marriage  to  Prince Bertil, Duke of Halland, HRH Princess Lilian of Sweden.

In 1990, there were 7 Princesses of Sweden, one by marriage (HRH) and six by birth 3 of whom were at the time, and still are holders of the Swedish equivalent of HRH and members of the Royal House

Prior to the marriage of Victoria, it was customary for a Swedish princess to relinquish the HRH and leave the Royal House upon marriage

By birth 

Princess Margaretha, Mrs. Ambler

Birgitta, Princess Johann Georg of Hohenzollern (Retained HRH, is widow of an HSH)

Désirée, Baroness Nils August Silfverschiöld 

Princess Christina, Mrs. Magnusson 

HRH Crown Princess Victoria, Duchess of Västergötland 

HRH Princess Madeleine, Duchess of Hälsingland and Gästrikland

By marriage HRH Princess Lilian of Sweden, Duchess of Halland

In what sense?  In Swedish there's a distinction between "the royal family" and "the kingly family."  The former would in 1990 have included the present king's daughters Victoria and Madeleine, his sister Birgitta, and his aunt by marriage, Lilian.  They were/are styled HRH.  The latter included his sisters Margaretha, Désirée and Christina.  They are princesses but are not styled HRH.