k-3 is for foreign income reporting. it's possible that neither partnership will have any info on the k-3.
EPD had no foreign reporting in 2020
MMP had no foreign reporting in 2019
so you may be waiting for nothing.
it's up to you. extend until you get the info and then e-file or uncheck the k-3 box to e-file now. if you later get K-3 info that affects your return then amend.
