My husband and I both meet the criteria for HOH spot on because we each maintained separate households and each took 2/4 of our kids. Can we both file HOH?

We lived separately last 6 months, are filling separate, each claiming two out of our 4 kids, and each maintained our own households. It seems like we should each be able to file HOH but I've heard that is not allowed or will spark and audit? How should I file?