It's not in any of the dictionaries here.
Interested in Language
Is there a word "headstead"?
Here I am looking to file some headstead forms for my properties. - JustAnswer there is something on "headstead forms" related to properties. Maybe somebone with more knowledge of that field will be able to clarify.
Please be aware that I'm neither a native English speaker nor a teacher.
I couldn't find the meaning of the word either, but I have seen that it's used in the context of beds. I don't know if I'm allowed to post links to Amazon, but here's a "headstead" Brushed Silver Metal Single Bed with Detailed Headstead: Amazon.co.uk: Kitchen & Home.