Contact BizToolStack

BizToolStack is operated by Zold LLC, United States.

For support, tool feedback, partnership inquiries or privacy questions, email info@zoldllc.com. We read every inquiry and typically respond within one to two business days.

Report a problem or bug

If you encounter a calculation discrepancy, a layout glitch, or an issue generating a PDF, please let us know so we can fix it promptly. When sending a bug report, it helps to include:

• The exact tool name or page URL.
• Your browser version and operating system (for example, Chrome on macOS or Safari on iOS).
• The specific input values or steps that reproduced the unexpected result.

Please use fictional example numbers instead of sensitive business information. Do not send confidential client lists, private financial records, passwords, or payment card details. BizToolStack team members will never ask for your account passwords or financial credentials.

What our support covers

We are glad to assist with:

• How our calculators, formula engines, and PDF generators function.
• Questions regarding fee rate formulas and public source documentation.
• Troubleshooting browser rendering, font loading, or document download issues.

Please note that BizToolStack provides informational utility tools and cannot offer personalized accounting, tax filing, legal, or financial advice. For specific account disputes, chargebacks, or merchant configuration questions, please contact your payment processor (such as Stripe, PayPal, Square, or Venmo) or marketplace directly.

Feature requests and fee updates

Our payment fee formulas are monitored on a regular schedule, but fee structures at major processors change over time. If you notice a recent provider rate change or want to request a new small business calculator, feel free to send us your feedback and documentation links.

Privacy questions

BizToolStack operates with a strict client-side architecture. All calculations, invoice inputs, and PDF exports remain entirely in your browser session. For more details on our zero-storage and privacy protections, review our Privacy Policy and Terms of Use.