You can claim these expenses as Miscellaneous expenses and describe them as Credit card processing fees.
In TurboTax Self-Employed, go to the summary page of your business and click on Edit next to the name of your business.
Under Business Expenses, click Start or Update next to Other Common Business Expenses.
On the next page, click Start or Update next to Other Miscellaneous Expenses at the bottom of the page.
TurboTax will display a page titled Any Miscellaneous Expenses? where you can enter the description and amount of this expense (see attached screenshot).
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