# Corporate tax provision for small business buyers: what AI models recommend, September 2026

Gane Index, September 2026 Edition. Asked as "corporate tax provision software" and as "income tax compliance software", six framings each, to twelve models with search on, on behalf of a small B2B company. Page: https://www.gane.ai/index/finance/tax/corporate-tax-provision/2026-09/smb

This is the permanent record of the September 2026 Edition, published September 17, 2026 and superseded since. The current standing: https://www.gane.ai/index/finance/tax/corporate-tax-provision/smb/index.md

**Standing:** Bloomberg Tax Provision leads with 13% of first choices; verdict contested. 52 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| Rank | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | [Bloomberg Tax Provision](https://www.gane.ai/index/finance/vendors/bloomberg-tax-provision/index.md) | 13% | 38% | 39 |
| 2 | [TurboTax Business](https://www.gane.ai/index/finance/vendors/turbotax-business/index.md) | 12% | 24% | 17 |
| 3 | [Exactera Tax Provision](https://www.gane.ai/index/finance/vendors/exactera-tax-provision/index.md) | 8% | 8% | 12 |
| 6 | [Avalara](https://www.gane.ai/index/finance/vendors/avalara/index.md) | 6% | 18% | 11 |
| 7 | [TaxAct Business](https://www.gane.ai/index/finance/vendors/taxact-business/index.md) | 4% | 0% | 12 |
| 10 | [Thomson Reuters ONESOURCE Tax Provision](https://www.gane.ai/index/finance/vendors/thomson-reuters-onesource-tax-provision/index.md) | 4% | 63% | 35 |
| 17 | [Sovos Tax Provision](https://www.gane.ai/index/finance/vendors/sovos-tax-provision/index.md) | 2% | 33% | 12 |
| 28 | [CSC Corptax Accounting for Income Taxes](https://www.gane.ai/index/finance/vendors/csc-corptax-accounting-for-income-taxes/index.md) | 2% | 85% | 13 |
| 29 | [Workiva Tax and Provision](https://www.gane.ai/index/finance/vendors/workiva-tax-and-provision/index.md) | 0% | 10% | 10 |
| 80 | [H&R Block Small Business](https://www.gane.ai/index/finance/vendors/h-r-block-small-business/index.md) | 0% | 45% | 11 |
| 91 | [Longview Tax](https://www.gane.ai/index/finance/vendors/longview-tax/index.md) | 0% | 73% | 11 |

Rank is by share of first choices among all 91 products named; products with the same share are tied, and the order among them carries no meaning. The table lists those with at least 10 labels.

## Each model's first choice on the direct prompt

- Claude Haiku 4.5: Thomson Reuters ONESOURCE Tax Provision; alternatives Bloomberg Tax Provision
- GPT-5.4 mini: Bloomberg Tax Provision; alternatives CCH Axcess, Thomson Reuters ONESOURCE Tax Provision
- Gemini 3.5 Flash: Bloomberg Tax Provision; alternatives Aleq, Exactera Tax Provision, Neo.Tax, Thomson Reuters ONESOURCE Tax Provision
- Perplexity Sonar: Bloomberg Tax Provision; alternatives CCH Tagetik Tax Provision & Reporting, Thomson Reuters ONESOURCE Tax Provision
- Grok 4.20: Drake Tax; alternatives CCH Axcess Tax, Taxfyle, UltraTax CS
- Mistral Small: Sovos Tax Provision, Vertex O Series; alternatives Thomson Reuters ONESOURCE Tax Provision
- DeepSeek V4 Flash: Drake Tax Provision, Excel; alternatives Bloomberg Tax Provision
- Llama 4 Maverick: no first choice
- Qwen 3.7 Flash: Exactera Tax Provision; alternatives Bloomberg Tax Provision, Pilot
- Kimi K2: TaxJar; alternatives Avalara, TaxSlayer Self-Employed, Thomson Reuters ONESOURCE Tax Provision
- GLM 4.7 FlashX: Drake Tax Provision; alternatives Exactera Tax Provision, Vena
- MiniMax M2.5: Bloomberg Tax Provision, Taxfyle; alternatives Sovos Tax Provision, Tax Technologies Provision Module, TaxPoint

## Sources the answers cite

64 of 72 answers came back with a source list, from 12 of 12 models. Sites named in the most answers:

- worldmetrics.org: 38 answers, 73 citations
- gitnux.org: 32 answers, 52 citations
- pro.bloombergtax.com: 28 answers, 60 citations
- wifitalents.com: 26 answers, 45 citations
- zipdo.co: 24 answers, 49 citations
- tax.thomsonreuters.com: 21 answers, 36 citations
- cnbc.com: 20 answers, 21 citations
- gartner.com: 20 answers, 20 citations

Pages named in the most answers:

- https://worldmetrics.org/best/corporate-tax-software (24 answers)
- https://wifitalents.com/best/tax-provision-software (23 answers)
- https://cnbc.com/select/best-tax-software-for-small-businesses (20 answers)
- https://gartner.com/reviews/market/tax-software (19 answers)
- https://rightworks.com/blog/best-accounting-tax-software-applications (18 answers)
- https://zipdo.co/best/corporate-tax-provision-software (18 answers)
- https://pro.bloombergtax.com/insights/tax-solutions/buyers-guide-how-to-find-the-right-tax-provision-software (16 answers)
- https://worldmetrics.org/best/tax-provision-software (16 answers)
- https://pro.bloombergtax.com/products/provision (13 answers)
- https://quicken.com/blog/best-tax-preparation-and-compliance-tools-for-small-businesses-in-2026 (13 answers)

## Warned against

- Thomson Reuters ONESOURCE Tax Provision: 22 of 35 labels negative. "Tools like Thomson Reuters OneSource Tax Provision (OTP) or similar high-end provision software are often overkill for small businesses" (Kimi K2, negative prompt)
- Bloomberg Tax Provision: 15 of 39 labels negative. "Avoid Bloomberg Tax Provision and Thomson Reuters ONESOURCE unless you have a large staff and a budget exceeding $25k–$50k/year." (Qwen 3.7 Flash, direct prompt)
- CSC Corptax Accounting for Income Taxes: 11 of 13 labels negative. "Avoid ONESOURCE and Corptax unless you have a Fortune-500-style tax department." (DeepSeek V4 Flash, direct prompt)
- Vertex: 7 of 9 labels negative. "Avoid the enterprise provision platforms (Bloomberg, ONESOURCE, Longview, Vertex)" (DeepSeek V4 Flash, budget prompt)

## Record

- Method: https://www.gane.ai/index/finance/methodology
- License: CC BY 4.0. Cite as Gane Index, September 2026 Edition, www.gane.ai/index/finance.