Best Small Business Tax Software in 2026
Updated
In short: Tax Series is ranked #1 of 29 as of 7 October 2026, ahead of X.TAX Business Tax and ONESOURCE Certificate Manager. The best-ranked option with a free plan is TaxAct. The lowest first paid tier on this page is UltimateTax at $15.67/mo.
Small-business tax software needs to fit both your filing obligations and the records you already maintain. Compared on business entity support, federal e-file, state e-file, and included state returns, these entries give you concrete filing dimensions to assess. Bookkeeping imports and prior-year import can matter when transferring information into a return workflow. Tax Series, X.TAX Business Tax, and TaxAct are among the options shown, with H&R Block Online and TurboTax also listed. Free-plan availability and paid-from pricing offer additional points of comparison. Match the listed capabilities to your business type, filing needs, and bookkeeping process before narrowing your choices.
29 small business tax software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Small Business Tax Software, one module each. A lit port is something its maker publishes; 3 of the 25 on this page have a public API.
- 01 Tax Series API yesOSS not on recordFREE not on recordDOCS 6.8
- 02 X.TAX Business Tax API yesOSS not on recordFREE not on recordDOCS 6.7
- 03 ONESOURCE Certificate Manager API yesOSS not on recordFREE not on recordDOCS 6.6
- 04 TaxAct API not on recordOSS not on recordFREE yesDOCS 6.0$44.99/mo
- 05 H&R Block Online API not on recordOSS not on recordFREE yesDOCS 5.9Free
- 06 TurboTax API not on recordOSS not on recordFREE yesDOCS 5.9$79/mo
- 07 Instead API not on recordOSS not on recordFREE yesDOCS 5.7Free
- 08 ProConnect Tax API not on recordOSS not on recordFREE not on recordDOCS 5.3$17.50/mo
- 09 UpTax API not on recordOSS not on recordFREE not on recordDOCS 5.3
- 10 CCH Axcess Practice API not on recordOSS not on recordFREE not on recordDOCS 5.2
- 11 Drake Tax API not on recordOSS not on recordFREE not on recordDOCS 5.2$25/mo
- 12 MyTAXPrepOffice API not on recordOSS not on recordFREE not on recordDOCS 5.2$74.58/mo
- 13 OLTPro API not on recordOSS not on recordFREE not on recordDOCS 5.2
- 14 Sure-Fire Tax Software API not on recordOSS not on recordFREE not on recordDOCS 5.2$56.58/mo
- 15 TaxSlayer Pro API not on recordOSS not on recordFREE not on recordDOCS 5.2$116.25/mo
- 16 TTS Tax Software API not on recordOSS not on recordFREE not on recordDOCS 5.2$297/mo
- 17 UltimateTax API not on recordOSS not on recordFREE not on recordDOCS 5.2$15.67/mo
- 18 ATX API not on recordOSS not on recordFREE not on recordDOCS 5.1
- 19 CCH ProSystem fx Tax API not on recordOSS not on recordFREE not on recordDOCS 5.1
- 20 NTO Software API not on recordOSS not on recordFREE not on recordDOCS 5.1
- 21 TaxWise API not on recordOSS not on recordFREE not on recordDOCS 5.1$35.75/mo
- 22 United eFile 1040+ Pro API not on recordOSS not on recordFREE not on recordDOCS 5.1
- 23 Sigma Tax Pro API not on recordOSS not on recordFREE not on recordDOCS 4.9
- 24 Go Tax Pro API not on recordOSS not on recordFREE not on recordDOCS 4.8
- 25 nLync 1040 Software API not on recordOSS not on recordFREE not on recordDOCS 4.8
Compare all 25 in a table
| # | Platform | Score | Free plan | From | Free plan | Paid from | Business entity support | Federal e-file |
|---|---|---|---|---|---|---|---|---|
| 1 | Tax Series | 6.8 | No | — | — | — | U.S. corporate taxpayers and multinational corporations | Yes |
| 2 | X.TAX Business Tax | 6.7 | No | — | — | — | Partnerships and multi-member LLCs (Form 1065); S corporations (Form 1120-S); C corporations (Form 1120) | Yes |
| 3 | ONESOURCE Certificate Manager | 6.6 | No | — | — | — | — | — |
| 4 | TaxAct | 6.0 | Free plan | $44.99/mo | Yes | 44.99 one-time | — | — |
| 5 | H&R Block Online | 5.9 | Free plan | Free | Yes | — | — | — |
| 6 | TurboTax | 5.9 | Free plan | $79/mo | Yes | 79 one-time | — | — |
| 7 | Instead | 5.7 | Free plan | Free | Yes | — | Individuals (1040), C corporations (1120), S corporations (1120-S), partnerships (1065), trusts and estates (1041) | Yes |
| 8 | ProConnect Tax | 5.3 | No | $17.50/mo | No | — | Partnerships (1065), S corporations (1120-S), C corporations (1120), estates and trusts (1041), nonprofits (990), gift tax (709) | Yes |
| 9 | UpTax | 5.3 | No | — | — | — | Individuals and sole proprietors; partnerships and LLCs; C corporations; S corporations; estates and trusts; nonprofits | — |
| 10 | CCH Axcess Practice | 5.2 | No | — | — | — | — | — |
| 11 | Drake Tax | 5.2 | No | $25/mo | No | — | — | — |
| 12 | MyTAXPrepOffice | 5.2 | No | $74.58/mo | No | — | 1065, 1120, 1120S, 1041, 990, 706, 709 | Yes |
| 13 | OLTPro | 5.2 | No | — | No | 499 one-time | 1041, 1065, 1120, 1120S, 2290, 5500, 720, 709, 706, 990, 8849 | Yes |
| 14 | Sure-Fire Tax Software | 5.2 | No | $56.58/mo | No | 299 one-time | S corporation; partnership; C corporation; estate; trust; nonprofit; employee benefit plan | Yes |
| 15 | TaxSlayer Pro | 5.2 | No | $116.25/mo | No | — | — | — |
| 16 | TTS Tax Software | 5.2 | No | $297/mo | — | — | Individual, business, and corporate returns; forms 1120, 1120-S, 1120-H, 1065, and 1041 | Yes |
| 17 | UltimateTax | 5.2 | No | $15.67/mo | No | — | partnership, C corporation, S corporation, fiduciary, exempt organization | Yes |
| 18 | ATX | 5.1 | No | — | No | — | C corporations, S corporations, partnerships, estates and trusts | Yes |
| 19 | CCH ProSystem fx Tax | 5.1 | No | — | — | — | Corporations (1120, 1120S, 1120F), partnerships (1065, 8865), fiduciaries (1041), estates and gifts (706/709), and individual returns (1040) | Yes |
| 20 | NTO Software | 5.1 | No | — | No | — | C corporations; S corporations; partnerships; trusts; estates; nonprofits | Yes |
| 21 | TaxWise | 5.1 | No | $35.75/mo | No | — | Partnership (1065), corporation (1120), S corporation (1120-S), fiduciary (1041), estate (706), gift (709), exempt organization (990) | Yes |
| 22 | United eFile 1040+ Pro | 5.1 | No | — | No | 850 one-time | Partnerships, C corporations, S corporations, estates and trusts, exempt organizations, employee benefit plans | Yes |
| 23 | Sigma Tax Pro | 4.9 | No | — | No | 495 one-time | Forms 1120 and 1065; individual 1040 returns | Yes |
| 24 | Go Tax Pro | 4.8 | No | — | No | 599 one-time | individual, corporate, small business | Yes |
| 25 | nLync 1040 Software | 4.8 | No | — | No | — | 990, 1040, 1041, 1065, 1120, 1120S | Yes |
Is your platform on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which small business tax software is ranked first on Inferse?
Tax Series is ranked #1 of 29 with a score of 6.8. X.TAX Business Tax is second and ONESOURCE Certificate Manager third.
How many of these have a free plan?
4 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, UltimateTax has the lowest first paid tier we found: $15.67/mo.
How is this list ranked?
Ranked on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it.