As the Executor of an Estate, can I request a K-1 Schedule after April 15 if I don’t know the beneficiary distributions yet?

I’m the executor of my father’s estate. He passed in 2017 and his estate generated less than $600 in income, so I don’t need to file a 1041 for 2017. The estate will pay out to the beneficiaries around July 2018, so can I submit a 1041 for K-1 Schedules in July once I know the exact amounts so the benificiaries have the K-1/1099-R in time to do their 2018 taxes by Feb-March 2019?