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Troubleshooting Invoices

Sunday, February 01, 2026 | By: Zibster Support Hub

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Troubleshooting Common Issues with Invoices in Zibster

This guide covers the most common issues Zibster users encounter when working with invoices and explains how to resolve them. Use the sections below to troubleshoot sales tax problems or payment errors so your invoices can be paid successfully.

Sales Tax Is Not Being Collected

If sales tax is not appearing on an invoice, the issue is usually related to tax settings, product settings, or missing client address information.

STEP ONE

Confirm Sales Tax Is Enabled

Log into your Zibster account and open ECOMMERCE from the left-side menu.

Click PAYMENTS, then select SALES TAX.

Verify that Sales Tax is enabled and that at least one tax rate has been added (for example, 6.5%).
If no tax rate exists, sales tax cannot be applied to invoices.

If needed, refer to the guide How to Add a Sales Tax Line in Zibster before continuing.

STEP TWO

Verify Product or Service Tax Settings

Sales tax must also be enabled on the items being invoiced.

Open PRODUCTS or SERVICES (depending on what is included on the invoice).

Edit the product or service used on the invoice.

Confirm that the item is marked as Taxable.

If the item is not taxable, sales tax will not apply even if sales tax is enabled globally.

STEP THREE

Check Client Address Information

Sales tax calculations rely on the client’s billing or shipping address.

Open the invoice and review the client’s contact details.

Confirm the following fields are completed:

  • State

  • Zip Code

If the address information is incomplete, sales tax may not calculate correctly.

Helpful Resource

How to Fix Missing Sales Tax on Invoices in Zibster

Error Code C257 Appears During Payment

If a client encounters Error Code C257 while attempting to pay an invoice, this error is generated by Stripe, one of the merchant providers that integrate with Zibster.

Stripe requires a complete billing address in order to authorize and process a payment. If any required billing address fields are missing, Stripe will block the transaction and display Error Code C257.

Required billing address fields include:

  • Street address

  • City

  • Zip / Postal code

  • State / Province

  • Country

STEP ONE

Add Billing Address Details

Open the affected invoice.

Edit the client’s contact information.

Confirm that all required billing address fields are filled in, not just the street address.

Save the changes to the invoice.

FINAL STEP

Resend The Invoice

Resend the updated invoice to the client.

Once the full billing address is present, Stripe will allow the payment to be processed without error.

Helpful Resource

How to Update Contact Details for Invoices in Zibster

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