https://www.irs.gov/forms-pubs/changes-to-the-2021-partnership-instructions-for-schedules-k-2-and-k-...

The following changes are applicable for the 2021 Partnership Instructions for Schedules K-2 and K-3 (Form 1065) PDF:

The following note is added as the last paragraph in the section entitled "Who Must File" on page 2:

Note. A partnership with no foreign source income, no assets generating foreign source income, and no foreign taxes paid or accrued may still need to report information on Schedules K-2 and K-3. For example, if the partner claims a credit for foreign taxes paid by the partner, the partner may need certain information from the partnership to complete Form 1116.