This video is to reset the service now or service overdue on a Volvo XC60 2012 but should work on all Volvo models within 2010 to 2018 and a similar dashboard (the part digital and part analogue) like in the thumbnail.
The process is simple holding down the trip counter and START/STOP button until it resets via the INFO amber light flashing. This will help you reset this yourself.
I also show you the iCarsoft diagnostics on my car and how to reset it using this and also where to access the park brake service tools and any faults I had showing on my XC60.