The best replacement for k-1 is 1099.

The best alternatives to k-1 are rated as following:
★★★★★  1099
★★★★  k-3
★★★  w-2
★★  pride
★  1065
★  schedule c
★  amended k-1

Your alternative for k-1 is not listed? Suggest!
Speaking about k-1, one probably shouldn't forget about personal tax return.

Other search terms related to k-1 and their ratings are:
★★★★★ personal tax return
★★★ 1040
★★ 1120s
You have in mind a companion for k-1 and it is not yet here? Propose!



Google Trends

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k-1
1099
k-3