I am the executor of a an estate. I made an initial distribution to the beneficiaries in 2019. Which box do I report this in the K-1?

I am the Executor of a small estate. There are three beneficiaries and over the course of 2019, I made an initial distribution of the assets to the beneficiaries which resulted from the sale of the decedent's house. There was no capital gain due to the sale of the house and I am not passing along any of the income accrued due to the estate getting interest on the money sitting in the bank.

I know I have to provide a K-1 to each of the beneficiaries, but am not sure which box I report the distribution in. There was no capital gain and no interest income involved. So boxes 1, 3, and 4a will all show $0. But which box gets the dollar amounts that were distributed?

Thanks!