Good article from Tax Adviser "A two-person partnership does not terminate upon a partner's death if the deceased partner's successor in interest (usually the estate) continues to share in the partnership's profits or losses (Regs. Sec. 1.708-1(b)(1)(I)). The partnership's tax year does not close, and the partner's distributive share of partnership income from the date of death through the end of the partnership tax year is reported on the tax return of the successor in interest (Regs. Sec. 1.706-1(a)). Likewise, if a partnership begins or continues to make liquidating payments to a deceased partner's successor in interest under the provisions of Sec. 736, the successor in interest is treated as a partner until the deceased partner's interest in the partnership has been completely liquidated (Regs. Sec. 1.736-1(a)(1)(ii)). In a two-person partnership, the partnership does not terminate, nor does the partnership year end (other than the partnership's normal tax year), until the final liquidating payment is made to the successor in interest (Regs. Sec. 1.736-1(a)(6))."

Here is link: https://www.thetaxadviser.com/issues/2015/aug/accounting-for-death-of-partner.html