Independent learners rely on the Lösungsschlüssel (answer key) to mimic a teacher's feedback.
Unlike many textbooks that keep solutions in a separate book, the actually includes solutions for its "Fokus Grammatik" sections directly in the appendix of the book itself. If you are looking for answers to the core grammar summaries, check the back of your Kursbuch first. 2. The Official Teacher’s Manual (Lehrerhandbuch) Ziel B2 1 Kursbuch Losungen
Solutions for the Workbook are more commonly available as free PDFs. Ziel B2 1 Kursbuch Losungen