You would enter the total amount of the expense, and then TurboTax will calculate your allowable portion based on the information about your workspace that you gave earlier.

Thanks for the info! Appreciate your help.

Actually, I forgot to add more critical information about my self-employment job. I only worked on my job for half the year, from September to December. Do I put the total cost of rent, internet and utilities just for those 4 months or for the entire year?

If you worked only as self-employed from September to December, you will have to change the fiscal period in your Self-employment section, or on the T2125 form if you are using TurboTax Desktop).

Thank you for choosing TurboTax.