Looking at the Geni link in her profile gives no sources but more info, for example her parents and more ancestors.
https://www.geni.com/people/Johanna-Toll/6000000000106311866
We already know a lot, full name, birth year and month, marriage date/place, death date/place, husband, parents, and we know she is in Halmstad.
We could just make an educated guess that she is born in Halmstad and go look for her in the birth records there.
But google is our friend, these names are not very common, we have dates, so googling what we have, plus her husband and her parents, is worth trying first.
When we are in the late 1700s to early 1800s, there is a huge chance others have already done all the work, we just need to find it. We need to search thoroughly and we need some luck, which we have today:
Jackpot number 1, here we have the complete noble family tree for her husband:
https://www.adelsvapen.com/genealogi/Toll_nr_314#TAB_24
"Florus Jakob Axel, född 1776-09-07 i Tenala socken."
"Kapten vid Göta artilleriregemente 1816-01-01. Chef för Hallands infanteribataljon 1824-02-24."
"Gift 1820-10-31 i Halmstad med Johanna Anna Christina Westberg, född 1795-08-00, död 1859-05-09 i nämnda stad, dotter av provinsialläkaren, med. doktorn Johan Lorentz Westberg och Anna Margareta Björck."
https://gamlahalmstad.se/aterblick-1924/
"Florus Axel Jacob Toll var född i Tenala socken i Finland 1776."
"Efter att ha bosatt sig i Halmstad 1820 gifte han sig med Johanna Anna Christina Westberg, dotter till provinsialläkaren Johan Lorentz Westberg"
https://gamlahalmstad.se/register-till-gh-arsbok/w-personregister/
"Westberg Johan Lorentz, medicinalråd, professor"
Jackpot number 2, a detailed Westberg familytree with her parents and her grandparents, and some exciting sources, in Swedish, Finnish, and some Latin, watch out:
https://www.malax.org/westside/forum/index.php?topic=16.15
"Tabell 3 (generation 2)
(Från Tabell 2)
Anetta Christina Johanna Westberg. Born 1795-09-08 in Halmstad. Died 1859-05-09 in Halmstad."
Now we need to double-check everything we can in better sources.
Like her birth record, 9 Aug 1795 in Halmstad:
Halmstads kyrkoarkiv (Halland)
Halmstad (N) CI:5 (1787-1805) Bild 1120 / Sida 215
http://www.arkivdigital.se/aid/show/v92475a.b1120.s215 ArkivDigital
https://sok.riksarkivet.se/?postid=ArkisRef%20SE/LLA/13138 Riksarkivet
"N: 31.
Annetta
Christina
Johanna"
"den 9 Augusti Fadren Professorn och Pro-
vincial Medicus Herr Lorents J: Wessberg"
"Anna Maria Björck"
"Annetta Christina Johanna"
