I hope that when governments around the world realise that WFH is going to become the norm for a large number of people they will adjust tax laws to allow write-offs where applicable.

Since April this year in the UK we can get up to £6 per week written off business expenses incurred as a result of WFH.

Of course, they may go the opposite direction to encourage people back into offices so coffee/sandwich shops etc. get more footfall.