If I enrolled in a General Purpose Health Care FSA for plan year 2020, don't re-enroll for plan year 2021, and have funds that carryover to 2021, can I still access those funds if I enroll in an HDHP with HSA for plan year 2021?

Yes. In this scenario, if the HDHP with HSA enrollment took effect January 1, 2021, the GPHC FSA carryover amount would transfer to an LPHC FSA. WageWorks’ system will automatically update the GPHC FSA to LPHC FSA plan based on the 2021 HSA contributions being received.