The PRISMA Statement is the key guideline for reporting on the results of your literature search. PRISMA provides a checklist and a template flow diagram:
If you're intending to publish in a journal, check its Instructions for Authors for any guidelines specific to systematic or scoping reviews.
For more general guidance, please see the guidelines in the Review Types section of this guide that correspond with the type of review you're doing and the subject (social sciences, environment, health, etc).
There is emerging guidance on reporting searches in more depth to support reproducibility. Please see the PRISMA-S link below for a draft checklist and supporting material.