If you buy a home testing kid, you may treat it as a deductible medical expense if you itemize deductions (IR-2021-181). It is an expense for the diagnosis of a medical condition. The cost may also be reimbursed through a health flexible spending account (FSA), a Health Savings Account (HSA), a Health Reimbursement Account (HRA), or an Archer Medical Savings Account.
Reminder: The cost of personal protective equipment (PPE) for the primary purpose of preventing the spread of COVID-19 are also eligible expenses that may be reimbursed through the various health accounts listed above.
Property subject to capital gain or loss treatment. Almost all assets you own are considered capital assets except for certain business assets or works you created.