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

Finance AI Recommendation 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://finance-ai-index.com/tax/corporate-tax-provision/smb/

**Standing:** Bloomberg Tax Provision leads with 14% of first choices; verdict contested. 51 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| # | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | Bloomberg Tax Provision | 14% | 38% | 39 |
| 2 | TurboTax Business | 8% | 27% | 15 |
| 3 | Avalara | 6% | 18% | 11 |
| 4 | TaxAct Business | 4% | 0% | 12 |
| 5 | Sovos Tax Provision | 2% | 33% | 12 |
| 6 | Thomson Reuters ONESOURCE Tax Provision | 2% | 50% | 14 |
| 7 | CSC Corptax | 2% | 85% | 13 |
| 8 | Thomson Reuters ONESOURCE | 2% | 71% | 21 |
| 9 | Longview Tax | 0% | 73% | 11 |

## 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 / CCH ProSystem fx provision stack, Thomson Reuters ONESOURCE Tax Provision
- Gemini 3.5 Flash: Bloomberg Tax Provision; alternatives Aleq, Exactera Tax Provision, Neo.Tax, Thomson Reuters ONESOURCE
- Perplexity Sonar: Bloomberg Tax Provision; alternatives CCH Tagetik Tax Provision & Reporting, Thomson Reuters ONESOURCE
- Grok 4.1 Fast: 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; 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, 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: 31 answers, 51 citations
- wifitalents.com: 26 answers, 45 citations
- zipdo.co: 24 answers, 49 citations
- pro.bloombergtax.com: 23 answers, 41 citations
- cnbc.com: 20 answers, 21 citations
- gartner.com: 19 answers, 19 citations
- tax.thomsonreuters.com: 17 answers, 30 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 (18 answers)
- https://zipdo.co/best/corporate-tax-provision-software (18 answers)
- https://worldmetrics.org/best/tax-provision-software (16 answers)
- https://rightworks.com/blog/best-accounting-tax-software-applications (15 answers)
- https://gitnux.org/best/tax-provisioning-software (12 answers)
- https://investopedia.com/the-best-tax-software-for-small-business-8780637 (12 answers)
- https://pro.bloombergtax.com/insights/tax-solutions/buyers-guide-how-to-find-the-right-tax-provision-software (12 answers)

## Warned against

- Thomson Reuters ONESOURCE: 15 of 21 labels negative. "Avoid for now: OneSource, Corptax, Longview – these are enterprise-grade tools with enterprise-grade price tags." (DeepSeek V4 Flash, scale 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: 11 of 13 labels negative. "Avoid ONESOURCE and Corptax unless you have a Fortune-500-style tax department." (DeepSeek V4 Flash, direct prompt)
- Thomson Reuters ONESOURCE Tax Provision: 7 of 14 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)

## Record

- Method: https://finance-ai-index.com/methodology/
- Raw judge labels and full responses: https://finance-ai-index.com/data/
- License: CC BY 4.0. Cite as Finance AI Recommendation Index, September 2026 Edition, finance-ai-index.com.