Previous HR of my company hadn't enrolled a few of the employees in PF as employees' in-hand salary was lesser back then, so they opted out of the PF scheme. In fact, they haven't filled any declaration on the PF portal stating that they are opting out of this PF scheme. And now, employees are asking me to include them also in PF. It's been 2 years since they joined the company. Can I enroll them in PF now? Please help me out with this.