Frum.Finance

For 2026 I'm going to have some side income on 1099s that will be filed on a schedule c.
What are the line items I should be tracking that can be expensed against it?
Internet, phone, AI subscriptions.

And how do quarterly estimates work when you are already withholding against your W2, do you still need to make payments?

I know for home office the language states that the space needs to be used `regularly and exclusively for business` does the same apply to the things mentioned above like internet and phone?