Should I provide home office expenses for the full year even if I started my business in September?

[shameless111]

I registered my business in September 2019. I have expenses for 2019 but no income until 2020. When I report my home office expenses (heat, internet, etc.) in TurboTax, should I report using 12 months of expenses or just 5 months? Where can I indicate that my expenses are only for 5 months of the year?

[TurboTaxBrenda1]

You will only enter the expenses for the months you had your business. They will know as you will enter the date when you started your business.

[shameless111]

Thanks so much for your reply. Where in TurboTax do I indicate the date that my business began? There is a spot where they require me to enter my fiscal year. I didn't see any spot to put the date my business began! 

[TurboTaxBrenda1]

Your fiscal year for 2019 would be the date you opened your business until the end of the year. This will be updated for next year.