Deductions for self-employed US Citizen living abroad with US-only income?

Hi guys, this is my situation:
I am a US-citizen living abroad but I am self-employed with US-only income. I don't have a job abroad. I don't have any bank accounts abroad. Everything is in the US, even my mobile plan. Can I enter for a home office deduction that is used exclusively for my US-based independent contractor job? I have TurboTax Home & Business and it is what I've used for over 15 years, while I lived in the US. I'm just not sure how to go about entering my home office expenses living abroad.

I do have a US home address where all of my tax-related items are mailed to,  if I need one, but I want to be very specific and as truthful as possible that I did not work at that address for the entire year. Help!