Can I edit a COI request to a subcontractor after sending it?

The answer here depends on what you are looking to do. If you are looking to remove a policy you've requested, that is not something you will be able to do on your side. You will need to contact Constrafor support.

If you are looking to add a policy you forgot about in the initial request, this is doable on your side. Simply follow the same steps you used to create your original COI request, except this time, when you review the policies to request at the bottom, uncheck what you've already requested and check the ones you'd like to add. Then click the Send requests button.