--- title: Which K – 1 Versions Are Supported in K1 Aggregator? description: A list of K – 1 Versions Supported in K1 Aggregator --- [Skip to content](https://support.k1x.io/which-k-1-versions-are-supported-in-k1-aggregator#main-content) [Submit A Support Ticket](https://support.k1x.io/kb-tickets/new?hsLang=en-us) [Client portal](https://support.k1x.io/tickets?hsLang=en-us) [![Group 16](https://support.k1x.io/hs-fs/hubfs/Group%2016.png?width=75&height=75&name=Group%2016.png)](https://support.k1x.io/?hsLang=en-us) - [Knowledge Base](https://support.k1x.io/) Open main navigation Close main navigation - [Knowledge Base](https://support.k1x.io/) - [Submit A Support Ticket](https://support.k1x.io/kb-tickets/new) - [Client portal](https://support.k1x.io/tickets) How can we help? - There are no suggestions because the search field is empty. 1. [K1x Knowledge Base](https://support.k1x.io/?hsLang=en-us) 2. [K1 Aggregator](https://support.k1x.io/k1-aggregator?hsLang=en-us) 3. [Reader Extraction & Document Upload](https://support.k1x.io/k1-aggregator?hsLang=en-us#reader-extraction-document-upload) December 17, 2025 # Which K – 1 Versions Are Supported in K1 Aggregator? ## A list of K – 1 Versions Supported in K1 Aggregator ### SUPPORTED K-1 VERSIONS ### K-1 \[Form 1065\] | Partnerships A partnership is a business structure in which two or more people share ownership of a business. Partnerships use Form 1065 to report their income, deductions, gains and losses to the IRS. Schedule K-1 (Form 1065) is one of the forms generated when preparing a partnership return. The form details each partner's share of the business' income, deductions, credits and other items. LLCs with more than one member also use Form 1065 to report their tax information to the IRS, and each partner receives a K-1 with their share of the LLC's income or losses, deductions and credits. K1 Aggregator also supports K-3 data for 1065 K-1s. ### K-1 \[Form 1120-S\] | S Corporations S Corporations combine pass-through tax benefits with the liability protection of a corporation. When it comes to tax returns, S-corps use Form 1120-S to report the company's income, deductions and credits. Like partnerships and LLCs with more than one member, S-corps provide their shareholders with a Schedule K-1 detailing each shareholder's portion of the company's income, deductions and credits. There is no support for 1120-S K-3. ### K-1 \[Form 1041\] | Trusts or estates Although they aren't business entities, trusts and estates also issue Schedule K-1s. A trust is a legal arrangement in which a trustee holds and manages assets to benefit beneficiaries. On the other hand, an estate refers to the assets and liabilities left behind after an individual's death. Trusts and estates file Form 1041, which reports their income, deductions, gains and losses to the IRS. Just like with other pass-through entities, trusts and estates provide their beneficiaries with a Schedule K-1 detailing their share of the entity's income, deductions and credits. There is no support for 1041 K-3. ### NOT SUPPORTED K-1 VERSIONS ### K-1 \[Form 8865\] | Return of U.S. Persons with Respect to Certain Foreign Partnerships Form 8865, or the Return of US Persons With Respect to Certain Foreign Partnerships, is a tax form used by individuals and entities to report ownership of, transactions with, and certain other activities related to controlled foreign partnerships. K-1 Reader does not currently support K-1 (Form 8865). 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All Rights Reserved. Patented/Patent-pending AI automation technology | The Digital K-1 Exchange and Digital K-1 Filetype. US2022/0405453 | AI-powered engine to extract data for K-1 PDF. US 2021/0082062 | C-TRAC. US 2010/0010849 1 High Street Court, Morristown, NJ 07960