@pauldnguyen2 Hello there. I think your post is better suited for the Expense forum. I'm going to move it there. 🙂
As you can see, I moved your post. You should be able to submit your expense report at any time, unless your company has enabled some sort of rule that requires reports to be submitted during a specific time period each month. I haven't see many companies do this, so you should be able to submit the report whenever you want.