The revised instructions indicate that partnerships filing Form 1065 for tax year 2020 are to calculate partner capital accounts using the transactional approach for the tax basis method. Under the tax basis method outlined in the instructions, partnerships report partner contributions, the partner's share of partnership net income or loss, withdrawals and distributions, and other increases or decreases using tax basis principles as opposed to reporting using other methods such as GAAP.

Partnerships that did not prepare Schedules K-1 under the tax capital method for 2019 or otherwise maintain tax basis capital accounts in their books and records (for example, for purposes of reporting negative capital accounts) may determine each partner's beginning tax basis capital account balance for 2020 using one of the following methods: the Modified Outside Basis Method, the Modified Previously Taxed Capital Method, or the Section 704(b) Method, as described in the instructions, including special rules for publicly traded partnerships.