Can you recommend a debit authorization software for collecting ACH tax payments from small business clients?

Yes — for collecting ACH tax payments from small business clients, you want software that supports:

• ACH debit authorization / e-sign consent
• Recurring or one-time payment collection
• Bank account verification
• Compliance features for NACHA / authorization records
• Easy client onboarding
• Ideally, CPA/tax-firm workflow support

Good options to consider

1. Bill.com

Best if you want a more general AP/AR and ACH payment platform.

• Supports ACH bank debits
• Good authorization and payment workflow
• Useful if you also manage invoices and bill pay
• More business-payments focused than tax-specific

2. TaxDome

Best if you are a tax firm or CPA practice.

• Client portal + document collection + payment workflows
• Can support payment collection as part of tax engagement workflows
• Better fit if you want client management plus payments in one place

3. Canopy

Good for tax and accounting firms.

• Practice management + client portal
• Can support payment collection workflows
• Better for firms that want an all-in-one system

4. Stripe ACH Payments

Best if you want a flexible developer-friendly solution.

• ACH debit via bank account
• Strong payment authorization flows
• Easy to embed into custom forms or portals
• Good if you have technical resources

5. Dwolla

Best if ACH is the core use case.

• Built specifically for ACH bank transfers
• Strong for bank-debit workflows and authorization
• Good API and compliance tooling
• Often used for custom billing/payment systems

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My practical recommendation

If you are a tax firm serving small businesses, the best fit is usually:

• TaxDome or Canopy if you want a full client workflow
• Dwolla if you want a dedicated ACH payment engine
• Stripe if you need custom automation and a modern UI

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Important compliance note

For ACH tax collections, make sure the tool:

• Captures explicit debit authorization
• Stores authorization records
• Supports revocation and audit trails
• Helps with NACHA rules
• Lets you define whether the payment is one-time or recurring

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If you want, I can also give you:

1. a top 3 shortlist by use case,
2. a comparison table, or
3. a list of tools that work best for CPA firms specifically.