Income and Expenses on Schedule C go to Schedule C. Then the Net Profit or loss goes to 1040 Schedule 1 line 3 which flows to 1040 line 8.
Some expenses, such as home office or section 179 depreciation can only be used to reduce your schedule C taxable income to zero, and not to create a loss. Excess deductions for these carry over to the next year. And you have to answer yes to both questions about exclusive and regular use, not just one. The area of your home office must be used regularly and exclusively for business to deduct it.
Tax preparation fees are no longer deductible on Schedule A from 2018 to 2025.
https://ttlc.intuit.com/community/credits-and-deductions/help/can-i-claim-tax-prep-fees-as-a-deducti...
But when it was deductible it wasn't worth even putting in. It is a Misc Deduction and only the amount OVER 2% of your AGI is deductible. And then all your deductions have to be more than the Standard Deduction to give you any benefit. You can only deduct the actual fees not the extra Refund Processing Service charge you paid if you selected the option to have the fees deducted from your federal refund.
You might be able to deduct tax prep on Schedule C for Business.
