When having a business in my apartment, how much of the rent and cell phone bill can be added to deductions?

[WillK · Accepted solution]

You will need to tell turbo tax the total square footage of your apartment and the square footage of the space that is exclusively used for business. The program will deduct what you can write off based on that percentage.

For your cell phone it depends. You need to calculate how much you use your cellphone for business and how much you used for personal use. 

For example, lets say your cell phone bill was $500.00 (used 100% of the time). You calculated that you used your phone 30% of the time for business and 70% of the time for personal. So $500.00 multiplied by 30%= $150.00. You can write off $150.00 as a business expense, and $350.00 would be a personal expense.