Question

We used Lifeline Screening for medical laboratory screening since we did not have a primary doctor. Can we deduct the cost as medical expenses when we itemize our taxes?

We paid for them using installments.

Yes, but only for amounts paid in 2020.

Deduct them on Schedule A.

Medical, dental, and vision expenses are reported on Schedule A and entered in the Deductions & Credits section.

With your return open, search for Schedule A and then select the Jump to link in the search results.
Answer Yes on the Did you spend more than $3,000 on medical expenses in 2020? screen.
Enter your medical expenses, starting with prescriptions, on the following screens.