Article content Specifically, the CRA was asked whether masks, COVID-19 testing and the cost of a foreign-administered vaccine would be eligible expenses. Before reviewing the CRA’s comments, let’s go over the general rule for claiming medical expenses on your tax return. We apologize, but this video has failed to load. Try refreshing your browser. Everything you need to know about claiming COVID-19 costs on your taxes Back to video For the 2021 tax year, valid medical expenses qualify for a 15-per-cent federal METC and a provincial credit, provided they exceed a minimum threshold equal to the lesser of three per cent of your net income or $2,421.