[1] In the off-season, Taschlerová/Taschler began training part-time in the United States with Collin Brubaker and Oleg Epstein, in addition to longtime coach Matteo Zanni in Milan.

[3] They returned to the Junior Grand Prix, competing first at 2019 JGP United States in Lake Placid, New York.

[1] Following the Junior Grand Prix, Taschlerová/Taschler elected to make their international senior debut, winning the silver medal at the Open d'Andorra and thereby obtaining the technical minimum qualifications to attend their first European Figure Skating Championships, where they finished in nineteenth position.

Taschlerová fell out of her twizzle at the beginning of the rhythm dance, landing them in nineteenth place in that segment.

[6] Due to the pandemic, the siblings could not continue training in the United States under Epstein and Brubaker and entered the season with only Zanni as their coach.

[7] They began their first full senior season at the 2020 CS Nebelhorn Trophy, their first Challenger event, which due to the pandemic was attended only by European teams largely training in the area.

[10] Taschlerová/Taschler began the new season on the Challenger series, placing fifth with new personal bests at the 2021 CS Lombardia Trophy.

They were assigned to the 2022 European Championships in Tallinn and finished eleventh, qualifying for the free dance for the first time.

[16] The team concluded the season at the 2022 World Championships, held in Montpellier with Russian dance teams absent due to the International Skating Union banning all Russian athletes due to their country's invasion of Ukraine.

[1] For the new season, Taschlerová and Taschler opted to perform a free dance based on the theme of climate change, a concept they had discussed since their junior career.

[1] They were invited to make their senior Grand Prix debut, and came fifth at the 2022 MK John Wilson Trophy.

[19] They also finished fifth at their second assignment, the 2022 Grand Prix of Espoo, 5.40 points back of bronze medalists Turkkila/Versluis of Finland.

[28] The duo were scheduled to compete at the 2023 Cup of China, but withdrew after what they had believed to be a minor injury to Taschler proved to be more serious.

[30] The siblings were able to resume training in early December, and participated in the 2024 European Championships, coming seventh.

[31] At the 2024 World Championships, Taschlerová/Taschler encountered difficulties in the rhythm when she slipped on attempting to go up in their lift, and they failed to execute the element.

[1] Going on to compete on the 2024–25 Grand Prix circuit, the team finished fourth at 2024 Skate Canada International and the 2024 Finlandia Trophy.