Hello happy new year to all, Text box input for year of purchase

[Tim507]

I'm working on a data base (Form) where I want to enter a year of purchase. I don't want the whole date just the year. I already have another text box with current year displayed. I want to be able to subtract the purchased year from the current year to get the equipment's age in years. Sounds simple, but I've been working on it for quite a while. I'm no programmer. I want to be able to do this in the displayed form under properties or expression builder. Thank you