Once your Employment Certification Form) ECF is submitted to FSA you will receive either a physical letter or email from them within 8-10 weeks. It is not uncommon to receive several letters or emails from FSA with updates to your PSLF status. You can also see these updates when you login to your studentaid.gov account. If you have any questions on these please use the Contact Us option on your dashboard to reach out to Customer Support.
While processing times may vary, it will take a few weeks for the form to show up on your FSA dashboard and you should receive the results of qualifying payments within 12 weeks.