Start with installing Manday Plugin for JIRA from Atlassian Marketplace.
In JIRA > Kanban board > Click on task > Click on "+ Add work log" > Insert date, duration, type & optionally description to modal windows > Save
In JIRA click on Apps > Manday > Choose day > Add work log (work item, duration, type & optionally description) > Save
In Manday.io you will find the monthly report, that displays a daily list of all hours worked by the logged-in user. Here you can edit, delete or add the tracked hours.
All your projects from external systems are displayed in the Timesheet tab. You can view, group and filter the hours worked as needed..
Optional grouping: Any variation of grouping allows you to display custom views of the work hours reports.
Filtering by companies, systems and projects: You can filter hours worked by companies, external systems, projects, users or log types.
Specific time range: Choose from preselected or custom time range for the report required.
MANDAY offers REST API connectivity to read and write data as needed. Therefore nothing prevents you from the integration with your own internal system or e.g. with PowerBI.