Hello there, Janice.
To provide you with the most accurate guidance, I'd like to know a bit more about your situation.
Could you clarify whether you're an employer working on your employees' T4 slips, or an individual trying to edit your own T4? Also, have you encountered any specific challenges or error messages during the editing process? Knowing this information will help me provide more targeted assistance.
As you work on your T4 slips, I recommend taking a moment to verify that all your company and employee information is up to date and accurate, as this data can significantly impact the process.
For your convenience, here's an article that offers step-by-step guidance on editing T4 slips in QuickBooks: How to edit T4 and RL-1 slips in QuickBooks Online Payroll.
Please feel free to share more details or ask any other questions you may have.