# Thomson Reuters UltraTax CS / GoSystem Tax RS: how AI models rank it, November 2026

Gane Index, November 2026 Edition. Named in 1 judge label across 1 category by 1 of 14 models. Page: https://www.gane.ai/index/finance/vendors/thomson-reuters-ultratax-cs-gosystem-tax-rs

## Standing by category

| Category | Share | Rank | Negative rate | Labels |
|---|---|---|---|---|
| [Corporate tax provision](https://www.gane.ai/index/finance/tax/corporate-tax-provision/index.md) | 0% | 54 | 0% | 1 |

## What the models said for it

- "GoSystem is designed for high-complexity corporate tax returns." (Gemini 3.5 Flash, Corporate tax provision)

## By model

| Model | First choice | Alternative | Mention | Warning | Labels |
|---|---|---|---|---|---|
| Claude Haiku 4.5 | 0 | 0 | 0 | 0 | 0 |
| GPT-5.4 mini | 0 | 0 | 0 | 0 | 0 |
| Gemini 3.5 Flash | 0 | 1 | 0 | 0 | 1 |
| Perplexity Sonar | 0 | 0 | 0 | 0 | 0 |
| Grok 4.20 | 0 | 0 | 0 | 0 | 0 |
| Mistral Small | 0 | 0 | 0 | 0 | 0 |
| DeepSeek V4 Flash | 0 | 0 | 0 | 0 | 0 |
| Llama 4 Maverick | 0 | 0 | 0 | 0 | 0 |
| Qwen 3.7 Flash | 0 | 0 | 0 | 0 | 0 |
| Kimi K2 | 0 | 0 | 0 | 0 | 0 |
| GLM 4.7 FlashX | 0 | 0 | 0 | 0 | 0 |
| MiniMax M2.5 | 0 | 0 | 0 | 0 | 0 |
| GPT-6 Luna | 0 | 0 | 0 | 0 | 0 |
| Muse Glimmer 30B | 0 | 0 | 0 | 0 | 0 |

## Sources returned with these answers

The sites and pages cited by the answers that named Thomson Reuters UltraTax CS / GoSystem Tax RS, from 1 of the 1 answers that named it (only the models that return a source list).

### Domains cited

- guideflow.com: 1
- invedus.com: 1
- kmkventures.com: 1
- rankite.com: 1
- reddit.com: 1
- rightworks.com: 1
- safebooksglobal.com: 1
- sourceforge.net: 1
- thecfoclub.com: 1
- thetaxadviser.com: 1

### Pages cited

- https://guideflow.com/blog/corporate-tax-software: 1
- https://invedus.com/blog/best-tax-preparation-software-for-cpas-and-accounting-firms-in-the-usa: 1
- https://kmkventures.com/choosing-the-right-tax-preparation-software-a-comprehensive-guide: 1
- https://rankite.com/blog/best-corporate-tax-return-software: 1
- https://rankite.com/blog/best-corporate-tax-software: 1
- https://reddit.com/r/taxpros/comments/rxkyzx/cch_v_thomson_reuters: 1
- https://rightworks.com/blog/best-accounting-tax-software-applications: 1
- https://safebooksglobal.com/blog/best-tax-software-cpa-firms: 1

## Record

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