You can check your remaining allocated hours by printing a specific report in the Allocation and Forecasting screen. To do so: 

1. Open the Allocation & Forecasting screen from the main menu > Projects.
2. On the Resource Allocation > Tasks tab, click More > View Reports.
3. Select 'Project Allocation Units Summary' from the Report List dialog.
4. This report displays your remaining hours and % remaining.

You can also use the Employee Allocation dashboard widget to check the remaining allocated hours if you have the required security settings.