Last year's medical expense claim period was Jan 1 to Dec 31. This year can I use Jan 1 to July 31 (6 mths) so that I can use the remainder of expenses next year?

Medical expenses were higher than normal and turbotax is prompting me to explore tax saving opportunities because of this but doesn't really say what to do. The expenses are over the max so I was trying to determine if I used a shorter time frame (6 mths) could I then use some of these expenses next year.