Log in to Stripe here.

Click on the Settings gear near the top right of the page or navigate to https://dashboard.stripe.com/settings
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Under the "Billing" section, click on "Invoice settings."
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To customize the the Icon, Logo, & Accent color as you see fit, click on the "Branding settings" link or navigate to https://dashboard.stripe.com/settings/branding
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Back on the "Invoice settings" page, you can also edit your invoice memo, footer, and default payment terms for your invoices.
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